diff --git a/packages/parameters/jest.config.js b/packages/parameters/jest.config.cjs
similarity index 93%
rename from packages/parameters/jest.config.js
rename to packages/parameters/jest.config.cjs
index 64f709a02..d06944c4d 100644
--- a/packages/parameters/jest.config.js
+++ b/packages/parameters/jest.config.cjs
@@ -5,6 +5,9 @@ module.exports = {
   },
   runner: 'groups',
   preset: 'ts-jest',
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
   transform: {
     '^.+\\.ts?$': 'ts-jest',
   },
diff --git a/packages/parameters/package.json b/packages/parameters/package.json
index 8cdfca28b..9a6bfb4f5 100644
--- a/packages/parameters/package.json
+++ b/packages/parameters/package.json
@@ -17,11 +17,13 @@
     "test:e2e:nodejs20x": "RUNTIME=nodejs20x jest --group=e2e",
     "test:e2e": "jest --group=e2e",
     "watch": "jest --watch",
-    "build": "tsc --build --force",
+    "build:cjs": "tsc --build --force && echo '{ \"type\": \"commonjs\" }' > lib/cjs/package.json",
+    "build:esm": "tsc --project tsconfig.esm.json && echo '{ \"type\": \"module\" }' > lib/esm/package.json",
+    "build": "npm run build:esm & npm run build:cjs",
     "lint": "eslint --ext .ts,.js --no-error-on-unmatched-pattern .",
     "lint-fix": "eslint --fix --ext .ts,.js --no-error-on-unmatched-pattern .",
     "prebuild": "rimraf ./lib",
-    "prepack": "node ../../.github/scripts/release_patch_package_json.js ."
+    "prepack": "rimraf ./lib/*.tsbuildinfo && node ../../.github/scripts/release_patch_package_json.js ."
   },
   "lint-staged": {
     "*.{js,ts}": "npm run lint-fix"
@@ -30,93 +32,110 @@
   "license": "MIT-0",
   "exports": {
     ".": {
-      "import": "./lib/index.js",
-      "require": "./lib/index.js"
+      "require": {
+        "types": "./lib/cjs/index.d.ts",
+        "default": "./lib/cjs/index.js"
+      },
+      "import": {
+        "types": "./lib/esm/index.d.ts",
+        "default": "./lib/esm/index.js"
+      }
     },
     "./base/types": {
-      "import": "./lib/types/BaseProvider.d.ts",
-      "require": "./lib/types/BaseProvider.d.ts"
+      "import": "./lib/esm/types/BaseProvider.d.ts",
+      "require": "./lib/cjs/types/BaseProvider.d.ts"
     },
     "./base": {
-      "import": "./lib/base/index.js",
-      "require": "./lib/base/index.js"
+      "import": "./lib/esm/base/index.js",
+      "require": "./lib/cjs/base/index.js"
     },
     "./ssm/types": {
-      "import": "./lib/types/SSMProvider.d.ts",
-      "require": "./lib/types/SSMProvider.d.ts"
+      "import": "./lib/esm/types/SSMProvider.d.ts",
+      "require": "./lib/cjs/types/SSMProvider.d.ts"
     },
     "./ssm": {
-      "import": "./lib/ssm/index.js",
-      "require": "./lib/ssm/index.js"
+      "import": "./lib/esm/ssm/index.js",
+      "require": "./lib/cjs/ssm/index.js"
     },
     "./secrets/types": {
-      "import": "./lib/types/SecretsProvider.d.ts",
-      "require": "./lib/types/SecretsProvider.d.ts"
+      "import": "./lib/esm/types/SecretsProvider.d.ts",
+      "require": "./lib/cjs/types/SecretsProvider.d.ts"
     },
     "./secrets": {
-      "import": "./lib/secrets/index.js",
-      "require": "./lib/secrets/index.js"
+      "import": "./lib/esm/secrets/index.js",
+      "require": "./lib/cjs/secrets/index.js"
     },
     "./dynamodb/types": {
-      "import": "./lib/types/AppConfigProvider.d.ts",
-      "require": "./lib/types/AppConfigProvider.d.ts"
+      "import": "./lib/esm/types/AppConfigProvider.d.ts",
+      "require": "./lib/cjs/types/AppConfigProvider.d.ts"
     },
     "./dynamodb": {
-      "import": "./lib/dynamodb/index.js",
-      "require": "./lib/dynamodb/index.js"
+      "import": "./lib/esm/dynamodb/index.js",
+      "require": "./lib/cjs/dynamodb/index.js"
     },
     "./appconfig/types": {
-      "import": "./lib/appconfig/index.js",
-      "require": "./lib/appconfig/index.js"
+      "import": "./lib/esm/appconfig/index.js",
+      "require": "./lib/cjs/appconfig/index.js"
     },
     "./appconfig": {
-      "import": "./lib/appconfig/index.js",
-      "require": "./lib/appconfig/index.js"
+      "import": "./lib/esm/appconfig/index.js",
+      "require": "./lib/cjs/appconfig/index.js"
     },
     "./errors": {
-      "import": "./lib/errors.js",
-      "require": "./lib/errors.js"
+      "import": "./lib/esm/errors.js",
+      "require": "./lib/cjs/errors.js"
     }
   },
   "typesVersions": {
     "*": {
       "base/types": [
-        "lib/types/BaseProvider.d.ts"
+        "lib/cjs/types/BaseProvider.d.ts",
+        "lib/esm/types/BaseProvider.d.ts"
       ],
       "base": [
-        "lib/base/index.d.ts"
+        "lib/cjs/base/index.d.ts",
+        "lib/esm/base/index.d.ts"
       ],
       "ssm/types": [
-        "lib/types/SSMProvider.d.ts"
+        "lib/cjs/types/SSMProvider.d.ts",
+        "lib/esm/types/SSMProvider.d.ts"
       ],
       "ssm": [
-        "lib/ssm/index.d.ts"
+        "lib/cjs/ssm/index.d.ts",
+        "lib/esm/ssm/index.d.ts"
       ],
       "secrets/types": [
-        "lib/types/SecretsProvider.d.ts"
+        "lib/cjs/types/SecretsProvider.d.ts",
+        "lib/esm/types/SecretsProvider.d.ts"
       ],
       "secrets": [
-        "lib/secrets/index.d.ts"
+        "lib/cjs/secrets/index.d.ts",
+        "lib/esm/secrets/index.d.ts"
       ],
       "dynamodb/types": [
-        "./lib/types/DynamoDBProvider.d.ts"
+        "./lib/cjs/types/DynamoDBProvider.d.ts",
+        "./lib/esm/types/DynamoDBProvider.d.ts"
       ],
       "dynamodb": [
-        "lib/dynamodb/index.d.ts"
+        "lib/cjs/dynamodb/index.d.ts",
+        "lib/esm/dynamodb/index.d.ts"
       ],
       "appconfig/types": [
-        "./lib/types/AppConfigProvider.d.ts"
+        "./lib/cjs/types/AppConfigProvider.d.ts",
+        "./lib/esm/types/AppConfigProvider.d.ts"
       ],
       "appconfig": [
-        "lib/appconfig/index.d.ts"
+        "lib/cjs/appconfig/index.d.ts",
+        "lib/esm/appconfig/index.d.ts"
       ],
       "errors": [
-        "lib/errors.d.ts"
+        "lib/cjs/errors.d.ts",
+        "lib/esm/errors.d.ts"
       ]
     }
   },
-  "main": "./lib/index.js",
-  "types": "./lib/index.d.ts",
+  "types": "./lib/cjs/index.d.ts",
+  "main": "./lib/cjs/index.js",
   "files": [
     "lib"
   ],
diff --git a/packages/parameters/src/appconfig/AppConfigProvider.ts b/packages/parameters/src/appconfig/AppConfigProvider.ts
index bf61526b6..576bb2210 100644
--- a/packages/parameters/src/appconfig/AppConfigProvider.ts
+++ b/packages/parameters/src/appconfig/AppConfigProvider.ts
@@ -1,4 +1,4 @@
-import { BaseProvider, DEFAULT_PROVIDERS } from '../base';
+import { BaseProvider } from '../base/BaseProvider.js';
 import {
   AppConfigDataClient,
   StartConfigurationSessionCommand,
@@ -9,8 +9,8 @@ import type {
   AppConfigProviderOptions,
   AppConfigGetOptions,
   AppConfigGetOutput,
-} from '../types/AppConfigProvider';
-import { APPCONFIG_TOKEN_EXPIRATION } from '../constants';
+} from '../types/AppConfigProvider.js';
+import { APPCONFIG_TOKEN_EXPIRATION } from '../constants.js';
 
 /**
  * ## Intro
@@ -361,4 +361,4 @@ class AppConfigProvider extends BaseProvider {
   }
 }
 
-export { AppConfigProvider, DEFAULT_PROVIDERS };
+export { AppConfigProvider };
diff --git a/packages/parameters/src/appconfig/getAppConfig.ts b/packages/parameters/src/appconfig/getAppConfig.ts
index 94d0a95e9..f7ec65f7f 100644
--- a/packages/parameters/src/appconfig/getAppConfig.ts
+++ b/packages/parameters/src/appconfig/getAppConfig.ts
@@ -1,8 +1,9 @@
-import { AppConfigProvider, DEFAULT_PROVIDERS } from './AppConfigProvider';
+import { AppConfigProvider } from './AppConfigProvider.js';
+import { DEFAULT_PROVIDERS } from '../base/index.js';
 import type {
   AppConfigGetOutput,
   GetAppConfigOptions,
-} from '../types/AppConfigProvider';
+} from '../types/AppConfigProvider.js';
 
 /**
  * ## Intro
diff --git a/packages/parameters/src/appconfig/index.ts b/packages/parameters/src/appconfig/index.ts
index 9b8a24a5a..39d7f59dd 100644
--- a/packages/parameters/src/appconfig/index.ts
+++ b/packages/parameters/src/appconfig/index.ts
@@ -1,2 +1,2 @@
-export * from './AppConfigProvider';
-export * from './getAppConfig';
+export { AppConfigProvider } from './AppConfigProvider.js';
+export { getAppConfig } from './getAppConfig.js';
diff --git a/packages/parameters/src/base/BaseProvider.ts b/packages/parameters/src/base/BaseProvider.ts
index 494c44ab0..739913e3a 100644
--- a/packages/parameters/src/base/BaseProvider.ts
+++ b/packages/parameters/src/base/BaseProvider.ts
@@ -5,17 +5,17 @@ import {
   isSdkClient,
   isString,
 } from '@aws-lambda-powertools/commons';
-import { GetOptions } from './GetOptions';
-import { GetMultipleOptions } from './GetMultipleOptions';
-import { ExpirableValue } from './ExpirableValue';
-import { GetParameterError, TransformParameterError } from '../errors';
-import { EnvironmentVariablesService } from '../config/EnvironmentVariablesService';
-import { transformValue } from './transformValue';
+import { GetOptions } from './GetOptions.js';
+import { GetMultipleOptions } from './GetMultipleOptions.js';
+import { ExpirableValue } from './ExpirableValue.js';
+import { GetParameterError, TransformParameterError } from '../errors.js';
+import { EnvironmentVariablesService } from '../config/EnvironmentVariablesService.js';
+import { transformValue } from './transformValue.js';
 import type {
   BaseProviderInterface,
   GetMultipleOptionsInterface,
   GetOptionsInterface,
-} from '../types/BaseProvider';
+} from '../types/BaseProvider.js';
 
 /**
  * Base class for all providers.
diff --git a/packages/parameters/src/base/DefaultProviders.ts b/packages/parameters/src/base/DefaultProviders.ts
index 692dacdcc..03832b4e8 100644
--- a/packages/parameters/src/base/DefaultProviders.ts
+++ b/packages/parameters/src/base/DefaultProviders.ts
@@ -1,4 +1,4 @@
-import type { BaseProviderInterface } from '../types/BaseProvider';
+import type { BaseProviderInterface } from '../types/BaseProvider.js';
 
 // These providers are dinamycally intialized on first use of the helper functions
 const DEFAULT_PROVIDERS: Record<string, BaseProviderInterface> = {};
diff --git a/packages/parameters/src/base/ExpirableValue.ts b/packages/parameters/src/base/ExpirableValue.ts
index 7793319e5..d9d213c71 100644
--- a/packages/parameters/src/base/ExpirableValue.ts
+++ b/packages/parameters/src/base/ExpirableValue.ts
@@ -1,4 +1,4 @@
-import type { ExpirableValueInterface } from '../types/BaseProvider';
+import type { ExpirableValueInterface } from '../types/BaseProvider.js';
 
 /**
  * Class to represent a value that can expire.
diff --git a/packages/parameters/src/base/GetMultipleOptions.ts b/packages/parameters/src/base/GetMultipleOptions.ts
index d452062e4..1bf2ca551 100644
--- a/packages/parameters/src/base/GetMultipleOptions.ts
+++ b/packages/parameters/src/base/GetMultipleOptions.ts
@@ -1,6 +1,6 @@
-import { GetOptions } from './GetOptions';
-import { EnvironmentVariablesService } from '../config/EnvironmentVariablesService';
-import type { GetMultipleOptionsInterface } from '../types/BaseProvider';
+import { GetOptions } from './GetOptions.js';
+import { EnvironmentVariablesService } from '../config/EnvironmentVariablesService.js';
+import type { GetMultipleOptionsInterface } from '../types/BaseProvider.js';
 
 /**
  * Options for the `getMultiple` method.
diff --git a/packages/parameters/src/base/GetOptions.ts b/packages/parameters/src/base/GetOptions.ts
index e83d0a622..1128f47fa 100644
--- a/packages/parameters/src/base/GetOptions.ts
+++ b/packages/parameters/src/base/GetOptions.ts
@@ -1,9 +1,9 @@
-import { EnvironmentVariablesService } from '../config/EnvironmentVariablesService';
-import { DEFAULT_MAX_AGE_SECS } from '../constants';
+import { EnvironmentVariablesService } from '../config/EnvironmentVariablesService.js';
+import { DEFAULT_MAX_AGE_SECS } from '../constants.js';
 import type {
   GetOptionsInterface,
   TransformOptions,
-} from '../types/BaseProvider';
+} from '../types/BaseProvider.js';
 
 /**
  * Options for the `get` method.
diff --git a/packages/parameters/src/base/index.ts b/packages/parameters/src/base/index.ts
index 2833869ad..9705d1348 100644
--- a/packages/parameters/src/base/index.ts
+++ b/packages/parameters/src/base/index.ts
@@ -1,4 +1,4 @@
-export * from './DefaultProviders';
-export * from './BaseProvider';
-export * from './GetOptions';
-export * from './GetMultipleOptions';
+export { BaseProvider } from './BaseProvider.js';
+export { DEFAULT_PROVIDERS, clearCaches } from './DefaultProviders.js';
+export { GetOptions } from './GetOptions.js';
+export { GetMultipleOptions } from './GetMultipleOptions.js';
diff --git a/packages/parameters/src/base/transformValue.ts b/packages/parameters/src/base/transformValue.ts
index 0d5a17510..3dc1c3fce 100644
--- a/packages/parameters/src/base/transformValue.ts
+++ b/packages/parameters/src/base/transformValue.ts
@@ -1,9 +1,12 @@
 import type { JSONValue } from '@aws-lambda-powertools/commons/types';
 import { isString } from '@aws-lambda-powertools/commons';
 import { fromBase64 } from '@aws-sdk/util-base64-node';
-import { TRANSFORM_METHOD_BINARY, TRANSFORM_METHOD_JSON } from '../constants';
-import { TransformParameterError } from '../errors';
-import type { TransformOptions } from '../types/BaseProvider';
+import {
+  TRANSFORM_METHOD_BINARY,
+  TRANSFORM_METHOD_JSON,
+} from '../constants.js';
+import { TransformParameterError } from '../errors.js';
+import type { TransformOptions } from '../types/BaseProvider.js';
 
 /**
  * Utility function to transform a value.
diff --git a/packages/parameters/src/config/EnvironmentVariablesService.ts b/packages/parameters/src/config/EnvironmentVariablesService.ts
index 3ae96c5d5..23744e748 100644
--- a/packages/parameters/src/config/EnvironmentVariablesService.ts
+++ b/packages/parameters/src/config/EnvironmentVariablesService.ts
@@ -1,5 +1,5 @@
-import { ConfigServiceInterface } from './ConfigServiceInterface';
-import { DEFAULT_MAX_AGE_SECS } from '../constants';
+import { ConfigServiceInterface } from '../types/ConfigServiceInterface.js';
+import { DEFAULT_MAX_AGE_SECS } from '../constants.js';
 import { EnvironmentVariablesService as CommonEnvironmentVariablesService } from '@aws-lambda-powertools/commons';
 
 class EnvironmentVariablesService
diff --git a/packages/parameters/src/dynamodb/DynamoDBProvider.ts b/packages/parameters/src/dynamodb/DynamoDBProvider.ts
index 0468c2aab..4bbd0bae2 100644
--- a/packages/parameters/src/dynamodb/DynamoDBProvider.ts
+++ b/packages/parameters/src/dynamodb/DynamoDBProvider.ts
@@ -1,4 +1,4 @@
-import { BaseProvider } from '../base';
+import { BaseProvider } from '../base/BaseProvider.js';
 import {
   DynamoDBClient,
   GetItemCommand,
@@ -12,7 +12,7 @@ import type {
   DynamoDBGetMultipleOptions,
   DynamoDBGetOutput,
   DynamoDBGetMultipleOutput,
-} from '../types/DynamoDBProvider';
+} from '../types/DynamoDBProvider.js';
 import type {
   GetItemCommandInput,
   QueryCommandInput,
diff --git a/packages/parameters/src/dynamodb/index.ts b/packages/parameters/src/dynamodb/index.ts
index 65bb79292..2165ec960 100644
--- a/packages/parameters/src/dynamodb/index.ts
+++ b/packages/parameters/src/dynamodb/index.ts
@@ -1 +1 @@
-export * from './DynamoDBProvider';
+export { DynamoDBProvider } from './DynamoDBProvider.js';
diff --git a/packages/parameters/src/index.ts b/packages/parameters/src/index.ts
index 13cad811c..3142feda2 100644
--- a/packages/parameters/src/index.ts
+++ b/packages/parameters/src/index.ts
@@ -1,2 +1,2 @@
-export * from './errors';
-export * from './constants';
+export * from './errors.js';
+export * from './constants.js';
diff --git a/packages/parameters/src/secrets/SecretsProvider.ts b/packages/parameters/src/secrets/SecretsProvider.ts
index fbc6cf095..01a8360af 100644
--- a/packages/parameters/src/secrets/SecretsProvider.ts
+++ b/packages/parameters/src/secrets/SecretsProvider.ts
@@ -1,4 +1,4 @@
-import { BaseProvider } from '../base';
+import { BaseProvider } from '../base/BaseProvider.js';
 import {
   SecretsManagerClient,
   GetSecretValueCommand,
@@ -8,7 +8,7 @@ import type {
   SecretsProviderOptions,
   SecretsGetOptions,
   SecretsGetOutput,
-} from '../types/SecretsProvider';
+} from '../types/SecretsProvider.js';
 
 /**
  * ## Intro
diff --git a/packages/parameters/src/secrets/getSecret.ts b/packages/parameters/src/secrets/getSecret.ts
index 1a0432ecf..ef84d5d58 100644
--- a/packages/parameters/src/secrets/getSecret.ts
+++ b/packages/parameters/src/secrets/getSecret.ts
@@ -1,9 +1,9 @@
-import { DEFAULT_PROVIDERS } from '../base';
-import { SecretsProvider } from './SecretsProvider';
+import { DEFAULT_PROVIDERS } from '../base/DefaultProviders.js';
+import { SecretsProvider } from './SecretsProvider.js';
 import type {
   SecretsGetOptions,
   SecretsGetOutput,
-} from '../types/SecretsProvider';
+} from '../types/SecretsProvider.js';
 
 /**
  * ## Intro
diff --git a/packages/parameters/src/secrets/index.ts b/packages/parameters/src/secrets/index.ts
index 5e54bcec5..6bb75d813 100644
--- a/packages/parameters/src/secrets/index.ts
+++ b/packages/parameters/src/secrets/index.ts
@@ -1,2 +1,2 @@
-export * from './SecretsProvider';
-export * from './getSecret';
+export { SecretsProvider } from './SecretsProvider.js';
+export { getSecret } from './getSecret.js';
diff --git a/packages/parameters/src/ssm/SSMProvider.ts b/packages/parameters/src/ssm/SSMProvider.ts
index c3f4c8e87..cb3fb82b2 100644
--- a/packages/parameters/src/ssm/SSMProvider.ts
+++ b/packages/parameters/src/ssm/SSMProvider.ts
@@ -1,7 +1,7 @@
-import { BaseProvider, DEFAULT_PROVIDERS } from '../base';
-import { transformValue } from '../base/transformValue';
-import { GetParameterError } from '../errors';
-import { DEFAULT_MAX_AGE_SECS } from '../constants';
+import { BaseProvider } from '../base/BaseProvider.js';
+import { transformValue } from '../base/transformValue.js';
+import { GetParameterError } from '../errors.js';
+import { DEFAULT_MAX_AGE_SECS } from '../constants.js';
 import {
   SSMClient,
   GetParameterCommand,
@@ -25,7 +25,7 @@ import type {
   SSMGetParametersByNameOptions,
   SSMSplitBatchAndDecryptParametersOutputType,
   SSMGetParametersByNameFromCacheOutputType,
-} from '../types/SSMProvider';
+} from '../types/SSMProvider.js';
 import type { PaginationConfiguration } from '@aws-sdk/types';
 
 /**
@@ -902,4 +902,4 @@ class SSMProvider extends BaseProvider {
   }
 }
 
-export { SSMProvider, DEFAULT_PROVIDERS };
+export { SSMProvider };
diff --git a/packages/parameters/src/ssm/getParameter.ts b/packages/parameters/src/ssm/getParameter.ts
index 55144a232..0f9e452a6 100644
--- a/packages/parameters/src/ssm/getParameter.ts
+++ b/packages/parameters/src/ssm/getParameter.ts
@@ -1,5 +1,6 @@
-import { SSMProvider, DEFAULT_PROVIDERS } from './SSMProvider';
-import type { SSMGetOptions, SSMGetOutput } from '../types/SSMProvider';
+import { DEFAULT_PROVIDERS } from '../base/DefaultProviders.js';
+import { SSMProvider } from './SSMProvider.js';
+import type { SSMGetOptions, SSMGetOutput } from '../types/SSMProvider.js';
 
 /**
  * ## Intro
diff --git a/packages/parameters/src/ssm/getParameters.ts b/packages/parameters/src/ssm/getParameters.ts
index 9c93aee93..7f2a3b1fc 100644
--- a/packages/parameters/src/ssm/getParameters.ts
+++ b/packages/parameters/src/ssm/getParameters.ts
@@ -1,8 +1,9 @@
-import { SSMProvider, DEFAULT_PROVIDERS } from './SSMProvider';
+import { DEFAULT_PROVIDERS } from '../base/DefaultProviders.js';
+import { SSMProvider } from './SSMProvider.js';
 import type {
   SSMGetMultipleOptions,
   SSMGetMultipleOutput,
-} from '../types/SSMProvider';
+} from '../types/SSMProvider.js';
 
 /**
  * ## Intro
diff --git a/packages/parameters/src/ssm/getParametersByName.ts b/packages/parameters/src/ssm/getParametersByName.ts
index 973a69019..72128db5a 100644
--- a/packages/parameters/src/ssm/getParametersByName.ts
+++ b/packages/parameters/src/ssm/getParametersByName.ts
@@ -1,8 +1,9 @@
-import { SSMProvider, DEFAULT_PROVIDERS } from './SSMProvider';
+import { DEFAULT_PROVIDERS } from '../base/DefaultProviders.js';
+import { SSMProvider } from './SSMProvider.js';
 import type {
   SSMGetParametersByNameOptions,
   SSMGetParametersByNameOutput,
-} from '../types/SSMProvider';
+} from '../types/SSMProvider.js';
 
 /**
  * ## Intro
diff --git a/packages/parameters/src/ssm/index.ts b/packages/parameters/src/ssm/index.ts
index 2efdcd695..ffa9aba3a 100644
--- a/packages/parameters/src/ssm/index.ts
+++ b/packages/parameters/src/ssm/index.ts
@@ -1,4 +1,4 @@
-export * from './SSMProvider';
-export * from './getParameter';
-export * from './getParameters';
-export * from './getParametersByName';
+export { SSMProvider } from './SSMProvider.js';
+export { getParameter } from './getParameter.js';
+export { getParameters } from './getParameters.js';
+export { getParametersByName } from './getParametersByName.js';
diff --git a/packages/parameters/src/types/AppConfigProvider.ts b/packages/parameters/src/types/AppConfigProvider.ts
index 4796db871..64dc4ee17 100644
--- a/packages/parameters/src/types/AppConfigProvider.ts
+++ b/packages/parameters/src/types/AppConfigProvider.ts
@@ -4,7 +4,7 @@ import type {
   AppConfigDataClientConfig,
   StartConfigurationSessionCommandInput,
 } from '@aws-sdk/client-appconfigdata';
-import type { GetOptionsInterface } from './BaseProvider';
+import type { GetOptionsInterface } from './BaseProvider.js';
 
 /**
  * Base interface for AppConfigProviderOptions.
diff --git a/packages/parameters/src/types/BaseProvider.ts b/packages/parameters/src/types/BaseProvider.ts
index 5a8297046..f773a7267 100644
--- a/packages/parameters/src/types/BaseProvider.ts
+++ b/packages/parameters/src/types/BaseProvider.ts
@@ -1,4 +1,4 @@
-import { Transform } from '../constants';
+import { Transform } from '../constants.js';
 
 /**
  * Type for the transform option.
diff --git a/packages/parameters/src/config/ConfigServiceInterface.ts b/packages/parameters/src/types/ConfigServiceInterface.ts
similarity index 100%
rename from packages/parameters/src/config/ConfigServiceInterface.ts
rename to packages/parameters/src/types/ConfigServiceInterface.ts
diff --git a/packages/parameters/src/types/DynamoDBProvider.ts b/packages/parameters/src/types/DynamoDBProvider.ts
index f9c316580..97b624163 100644
--- a/packages/parameters/src/types/DynamoDBProvider.ts
+++ b/packages/parameters/src/types/DynamoDBProvider.ts
@@ -8,7 +8,7 @@ import type {
 import type {
   GetMultipleOptionsInterface,
   GetOptionsInterface,
-} from './BaseProvider';
+} from './BaseProvider.js';
 
 /**
  * Base interface for DynamoDBProviderOptions.
diff --git a/packages/parameters/src/types/SSMProvider.ts b/packages/parameters/src/types/SSMProvider.ts
index 7802f085a..b647fe29c 100644
--- a/packages/parameters/src/types/SSMProvider.ts
+++ b/packages/parameters/src/types/SSMProvider.ts
@@ -9,7 +9,7 @@ import type {
   GetMultipleOptionsInterface,
   GetOptionsInterface,
   TransformOptions,
-} from './BaseProvider';
+} from './BaseProvider.js';
 
 /**
  * Interface for SSMProvider with clientConfig property.
diff --git a/packages/parameters/src/types/SecretsProvider.ts b/packages/parameters/src/types/SecretsProvider.ts
index 96cd907b2..9e2c492f3 100644
--- a/packages/parameters/src/types/SecretsProvider.ts
+++ b/packages/parameters/src/types/SecretsProvider.ts
@@ -4,7 +4,7 @@ import type {
   SecretsManagerClient,
   SecretsManagerClientConfig,
 } from '@aws-sdk/client-secrets-manager';
-import type { GetOptionsInterface, TransformOptions } from './BaseProvider';
+import type { GetOptionsInterface, TransformOptions } from './BaseProvider.js';
 
 /**
  * Base interface for SecretsProviderOptions.
diff --git a/packages/parameters/tests/e2e/appConfigProvider.class.test.functionCode.ts b/packages/parameters/tests/e2e/appConfigProvider.class.test.functionCode.ts
index 48735b703..c55193326 100644
--- a/packages/parameters/tests/e2e/appConfigProvider.class.test.functionCode.ts
+++ b/packages/parameters/tests/e2e/appConfigProvider.class.test.functionCode.ts
@@ -1,9 +1,9 @@
 import type { Context } from 'aws-lambda';
-import { Transform } from '../../src';
-import { AppConfigProvider } from '../../src/appconfig';
-import { AppConfigGetOptions } from '../../src/types/AppConfigProvider';
-import { TinyLogger } from '../helpers/tinyLogger';
-import { middleware } from '../helpers/sdkMiddlewareRequestCounter';
+import { Transform } from '../../src/constants.js';
+import { AppConfigProvider } from '../../src/appconfig/AppConfigProvider.js';
+import { AppConfigGetOptions } from '../../src/types/AppConfigProvider.js';
+import { TinyLogger } from '../helpers/tinyLogger.js';
+import { middleware } from '../helpers/sdkMiddlewareRequestCounter.js';
 import { AppConfigDataClient } from '@aws-sdk/client-appconfigdata';
 
 // We use a custom logger to log pure JSON objects to stdout
diff --git a/packages/parameters/tests/e2e/appConfigProvider.class.test.ts b/packages/parameters/tests/e2e/appConfigProvider.class.test.ts
index 6d28b3ef0..35c150840 100644
--- a/packages/parameters/tests/e2e/appConfigProvider.class.test.ts
+++ b/packages/parameters/tests/e2e/appConfigProvider.class.test.ts
@@ -11,13 +11,13 @@ import {
 } from '@aws-lambda-powertools/testing-utils';
 import { toBase64 } from '@aws-sdk/util-base64-node';
 import { join } from 'node:path';
-import { TestAppConfigWithProfiles } from '../helpers/resources';
+import { TestAppConfigWithProfiles } from '../helpers/resources.js';
 import {
   RESOURCE_NAME_PREFIX,
   SETUP_TIMEOUT,
   TEARDOWN_TIMEOUT,
   TEST_CASE_TIMEOUT,
-} from './constants';
+} from './constants.js';
 
 /**
  * This test suite deploys a CDK stack with a Lambda function and a number of AppConfig parameters.
diff --git a/packages/parameters/tests/e2e/dynamoDBProvider.class.test.functionCode.ts b/packages/parameters/tests/e2e/dynamoDBProvider.class.test.functionCode.ts
index 88f1eccd2..808bb188e 100644
--- a/packages/parameters/tests/e2e/dynamoDBProvider.class.test.functionCode.ts
+++ b/packages/parameters/tests/e2e/dynamoDBProvider.class.test.functionCode.ts
@@ -1,12 +1,12 @@
 import type { Context } from 'aws-lambda';
-import { Transform } from '../../src';
-import { DynamoDBProvider } from '../../src/dynamodb';
+import { Transform } from '../../src/constants.js';
+import { DynamoDBProvider } from '../../src/dynamodb/DynamoDBProvider.js';
 import {
   DynamoDBGetOptions,
   DynamoDBGetMultipleOptions,
-} from '../../src/types/DynamoDBProvider';
-import { TinyLogger } from '../helpers/tinyLogger';
-import { middleware } from '../helpers/sdkMiddlewareRequestCounter';
+} from '../../src/types/DynamoDBProvider.js';
+import { TinyLogger } from '../helpers/tinyLogger.js';
+import { middleware } from '../helpers/sdkMiddlewareRequestCounter.js';
 import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
 
 // We use a custom logger to log pure JSON objects to stdout
diff --git a/packages/parameters/tests/e2e/dynamoDBProvider.class.test.ts b/packages/parameters/tests/e2e/dynamoDBProvider.class.test.ts
index dfc730d46..391d215f7 100644
--- a/packages/parameters/tests/e2e/dynamoDBProvider.class.test.ts
+++ b/packages/parameters/tests/e2e/dynamoDBProvider.class.test.ts
@@ -11,13 +11,13 @@ import {
 } from '@aws-lambda-powertools/testing-utils';
 import { AttributeType } from 'aws-cdk-lib/aws-dynamodb';
 import { join } from 'node:path';
-import { TestDynamodbTableWithItems } from '../helpers/resources';
+import { TestDynamodbTableWithItems } from '../helpers/resources.js';
 import {
   RESOURCE_NAME_PREFIX,
   SETUP_TIMEOUT,
   TEARDOWN_TIMEOUT,
   TEST_CASE_TIMEOUT,
-} from './constants';
+} from './constants.js';
 
 /**
  * This test suite deploys a CDK stack with a Lambda function and a number of DynamoDB tables.
diff --git a/packages/parameters/tests/e2e/secretsProvider.class.test.functionCode.ts b/packages/parameters/tests/e2e/secretsProvider.class.test.functionCode.ts
index e7526fdef..4c0448489 100644
--- a/packages/parameters/tests/e2e/secretsProvider.class.test.functionCode.ts
+++ b/packages/parameters/tests/e2e/secretsProvider.class.test.functionCode.ts
@@ -1,10 +1,10 @@
 import { Context } from 'aws-lambda';
-import { TinyLogger } from '../helpers/tinyLogger';
+import { TinyLogger } from '../helpers/tinyLogger.js';
 import { SecretsManagerClient } from '@aws-sdk/client-secrets-manager';
-import { middleware } from '../helpers/sdkMiddlewareRequestCounter';
-import { Transform } from '../../src';
-import { SecretsProvider } from '../../src/secrets';
-import { SecretsGetOptions } from '../../src/types/SecretsProvider';
+import { middleware } from '../helpers/sdkMiddlewareRequestCounter.js';
+import { Transform } from '../../src/constants.js';
+import { SecretsProvider } from '../../src/secrets/SecretsProvider.js';
+import { SecretsGetOptions } from '../../src/types/SecretsProvider.js';
 
 const logger = new TinyLogger();
 const defaultProvider = new SecretsProvider();
diff --git a/packages/parameters/tests/e2e/secretsProvider.class.test.ts b/packages/parameters/tests/e2e/secretsProvider.class.test.ts
index 3b700cdd3..a5f0c539b 100644
--- a/packages/parameters/tests/e2e/secretsProvider.class.test.ts
+++ b/packages/parameters/tests/e2e/secretsProvider.class.test.ts
@@ -11,13 +11,13 @@ import {
 } from '@aws-lambda-powertools/testing-utils';
 import { SecretValue } from 'aws-cdk-lib';
 import { join } from 'node:path';
-import { TestSecret } from '../helpers/resources';
+import { TestSecret } from '../helpers/resources.js';
 import {
   RESOURCE_NAME_PREFIX,
   SETUP_TIMEOUT,
   TEARDOWN_TIMEOUT,
   TEST_CASE_TIMEOUT,
-} from './constants';
+} from './constants.js';
 
 /**
  * Collection of e2e tests for SecretsProvider utility.
diff --git a/packages/parameters/tests/e2e/ssmProvider.class.test.functionCode.ts b/packages/parameters/tests/e2e/ssmProvider.class.test.functionCode.ts
index a8915c277..f1b6171e0 100644
--- a/packages/parameters/tests/e2e/ssmProvider.class.test.functionCode.ts
+++ b/packages/parameters/tests/e2e/ssmProvider.class.test.functionCode.ts
@@ -1,12 +1,12 @@
-import { Context } from 'aws-lambda';
-import { SSMProvider } from '../../src/ssm';
+import type { Context } from 'aws-lambda';
+import { SSMProvider } from '../../src/ssm/SSMProvider.js';
 import {
   SSMGetOptions,
   SSMGetMultipleOptions,
   SSMGetParametersByNameOptions,
-} from '../../src/types/SSMProvider';
-import { TinyLogger } from '../helpers/tinyLogger';
-import { middleware } from '../helpers/sdkMiddlewareRequestCounter';
+} from '../../src/types/SSMProvider.js';
+import { TinyLogger } from '../helpers/tinyLogger.js';
+import { middleware } from '../helpers/sdkMiddlewareRequestCounter.js';
 import { SSMClient } from '@aws-sdk/client-ssm';
 
 // We use a custom logger to log pure JSON objects to stdout
diff --git a/packages/parameters/tests/e2e/ssmProvider.class.test.ts b/packages/parameters/tests/e2e/ssmProvider.class.test.ts
index 771aafd7c..9af29e831 100644
--- a/packages/parameters/tests/e2e/ssmProvider.class.test.ts
+++ b/packages/parameters/tests/e2e/ssmProvider.class.test.ts
@@ -13,13 +13,13 @@ import { join } from 'node:path';
 import {
   TestSecureStringParameter,
   TestStringParameter,
-} from '../helpers/resources';
+} from '../helpers/resources.js';
 import {
   RESOURCE_NAME_PREFIX,
   SETUP_TIMEOUT,
   TEARDOWN_TIMEOUT,
   TEST_CASE_TIMEOUT,
-} from './constants';
+} from './constants.js';
 
 /**
  * This test suite deploys a CDK stack with a Lambda function and a number of SSM parameters.
diff --git a/packages/parameters/tests/helpers/tinyLogger.ts b/packages/parameters/tests/helpers/tinyLogger.ts
index 4fd4603d5..c49ec87ed 100644
--- a/packages/parameters/tests/helpers/tinyLogger.ts
+++ b/packages/parameters/tests/helpers/tinyLogger.ts
@@ -1,4 +1,4 @@
-import { Console } from 'console';
+import { Console } from 'node:console';
 
 /**
  * A tiny logger that logs to stdout and stderr.
diff --git a/packages/parameters/tests/unit/AppConfigProvider.test.ts b/packages/parameters/tests/unit/AppConfigProvider.test.ts
index 84e72889d..71881d3c4 100644
--- a/packages/parameters/tests/unit/AppConfigProvider.test.ts
+++ b/packages/parameters/tests/unit/AppConfigProvider.test.ts
@@ -3,9 +3,9 @@
  *
  * @group unit/parameters/AppConfigProvider/class
  */
-import { AppConfigProvider } from '../../src/appconfig/index';
-import { ExpirableValue } from '../../src/base/ExpirableValue';
-import { AppConfigProviderOptions } from '../../src/types/AppConfigProvider';
+import { AppConfigProvider } from '../../src/appconfig/index.js';
+import { ExpirableValue } from '../../src/base/ExpirableValue.js';
+import { AppConfigProviderOptions } from '../../src/types/AppConfigProvider.js';
 import {
   AppConfigDataClient,
   GetLatestConfigurationCommand,
diff --git a/packages/parameters/tests/unit/BaseProvider.test.ts b/packages/parameters/tests/unit/BaseProvider.test.ts
index 355ae5ca2..f5ef95679 100644
--- a/packages/parameters/tests/unit/BaseProvider.test.ts
+++ b/packages/parameters/tests/unit/BaseProvider.test.ts
@@ -3,9 +3,20 @@
  *
  * @group unit/parameters/baseProvider/class
  */
-import { BaseProvider, clearCaches, DEFAULT_PROVIDERS } from '../../src/base';
-import { ExpirableValue } from '../../src/base/ExpirableValue';
-import { GetParameterError, TransformParameterError } from '../../src/errors';
+import {
+  BaseProvider,
+  clearCaches,
+  DEFAULT_PROVIDERS,
+  GetOptions,
+  GetMultipleOptions,
+} from '../../src/base/index.js';
+import { DEFAULT_MAX_AGE_SECS } from '../../src/index.js';
+import type { EnvironmentVariablesService } from '../../src/config/EnvironmentVariablesService.js';
+import { ExpirableValue } from '../../src/base/ExpirableValue.js';
+import {
+  GetParameterError,
+  TransformParameterError,
+} from '../../src/errors.js';
 import { toBase64 } from '@aws-sdk/util-base64-node';
 
 const encoder = new TextEncoder();
@@ -614,3 +625,35 @@ describe('Function: clearCaches', () => {
     expect(provider2Spy).toBeCalledTimes(1);
   });
 });
+
+describe('Class: GetOptions', () => {
+  it('should set the default maxAge when not provided', () => {
+    // Prepare
+    const envVarsService = {
+      getParametersMaxAge: jest.fn(),
+    };
+    const options = new GetOptions(
+      undefined,
+      envVarsService as unknown as EnvironmentVariablesService
+    );
+
+    // Assess
+    expect(options.maxAge).toBe(DEFAULT_MAX_AGE_SECS);
+  });
+});
+
+describe('Class: GetMultipleOptions', () => {
+  it('should set throwOnTransformError to false when not provided', () => {
+    // Prepare
+    const envVarsService = {
+      getParametersMaxAge: jest.fn(),
+    };
+    const options = new GetMultipleOptions(
+      undefined,
+      envVarsService as unknown as EnvironmentVariablesService
+    );
+
+    // Assess
+    expect(options.throwOnTransformError).toBe(false);
+  });
+});
diff --git a/packages/parameters/tests/unit/DynamoDBProvider.test.ts b/packages/parameters/tests/unit/DynamoDBProvider.test.ts
index b8112b890..12ccd80d0 100644
--- a/packages/parameters/tests/unit/DynamoDBProvider.test.ts
+++ b/packages/parameters/tests/unit/DynamoDBProvider.test.ts
@@ -3,7 +3,7 @@
  *
  * @group unit/parameters/DynamoDBProvider/class
  */
-import { DynamoDBProvider } from '../../src/dynamodb';
+import { DynamoDBProvider } from '../../src/dynamodb/index.js';
 import {
   DynamoDBClient,
   GetItemCommand,
@@ -13,7 +13,7 @@ import type {
   GetItemCommandInput,
   QueryCommandInput,
 } from '@aws-sdk/client-dynamodb';
-import type { DynamoDBProviderOptions } from '../../src/types/DynamoDBProvider';
+import type { DynamoDBProviderOptions } from '../../src/types/DynamoDBProvider.js';
 import { marshall } from '@aws-sdk/util-dynamodb';
 import { addUserAgentMiddleware } from '@aws-lambda-powertools/commons';
 import { mockClient } from 'aws-sdk-client-mock';
diff --git a/packages/parameters/tests/unit/config/EnvironmentVariablesService.test.ts b/packages/parameters/tests/unit/EnvironmentVariablesService.test.ts
similarity index 95%
rename from packages/parameters/tests/unit/config/EnvironmentVariablesService.test.ts
rename to packages/parameters/tests/unit/EnvironmentVariablesService.test.ts
index 80e60086c..c8bca2a8e 100644
--- a/packages/parameters/tests/unit/config/EnvironmentVariablesService.test.ts
+++ b/packages/parameters/tests/unit/EnvironmentVariablesService.test.ts
@@ -3,7 +3,7 @@
  *
  * @group unit/parameters/config
  */
-import { EnvironmentVariablesService } from '../../../src/config/EnvironmentVariablesService';
+import { EnvironmentVariablesService } from '../../src/config/EnvironmentVariablesService.js';
 
 describe('Class: EnvironmentVariablesService', () => {
   const ENVIRONMENT_VARIABLES = process.env;
diff --git a/packages/parameters/tests/unit/SSMProvider.test.ts b/packages/parameters/tests/unit/SSMProvider.test.ts
index c11d2410b..04da68117 100644
--- a/packages/parameters/tests/unit/SSMProvider.test.ts
+++ b/packages/parameters/tests/unit/SSMProvider.test.ts
@@ -3,7 +3,7 @@
  *
  * @group unit/parameters/ssm/class
  */
-import { SSMProvider } from '../../src/ssm';
+import { SSMProvider } from '../../src/ssm/index.js';
 import {
   SSMClient,
   GetParameterCommand,
@@ -19,8 +19,8 @@ import type {
   SSMGetParametersByNameOptions,
   SSMSplitBatchAndDecryptParametersOutputType,
   SSMGetParametersByNameOutputInterface,
-} from '../../src/types/SSMProvider';
-import { ExpirableValue } from '../../src/base/ExpirableValue';
+} from '../../src/types/SSMProvider.js';
+import { ExpirableValue } from '../../src/base/ExpirableValue.js';
 import { toBase64 } from '@aws-sdk/util-base64-node';
 import { addUserAgentMiddleware } from '@aws-lambda-powertools/commons';
 
diff --git a/packages/parameters/tests/unit/SecretsProvider.test.ts b/packages/parameters/tests/unit/SecretsProvider.test.ts
index 9bfd25453..04f54adc2 100644
--- a/packages/parameters/tests/unit/SecretsProvider.test.ts
+++ b/packages/parameters/tests/unit/SecretsProvider.test.ts
@@ -3,13 +3,13 @@
  *
  * @group unit/parameters/SecretsProvider/class
  */
-import { SecretsProvider } from '../../src/secrets';
+import { SecretsProvider } from '../../src/secrets/index.js';
 import {
   SecretsManagerClient,
   GetSecretValueCommand,
 } from '@aws-sdk/client-secrets-manager';
 import type { GetSecretValueCommandInput } from '@aws-sdk/client-secrets-manager';
-import type { SecretsProviderOptions } from '../../src/types/SecretsProvider';
+import type { SecretsProviderOptions } from '../../src/types/SecretsProvider.js';
 import { mockClient } from 'aws-sdk-client-mock';
 import 'aws-sdk-client-mock-jest';
 import { addUserAgentMiddleware } from '@aws-lambda-powertools/commons';
diff --git a/packages/parameters/tests/unit/getAppConfig.test.ts b/packages/parameters/tests/unit/getAppConfig.test.ts
index 3243f38f0..adbc2f6a6 100644
--- a/packages/parameters/tests/unit/getAppConfig.test.ts
+++ b/packages/parameters/tests/unit/getAppConfig.test.ts
@@ -3,12 +3,9 @@
  *
  * @group unit/parameters/AppConfigProvider/getAppConfig/function
  */
-import {
-  AppConfigProvider,
-  getAppConfig,
-  DEFAULT_PROVIDERS,
-} from '../../src/appconfig';
-import { Transform } from '../../src';
+import { AppConfigProvider, getAppConfig } from '../../src/appconfig/index.js';
+import { DEFAULT_PROVIDERS } from '../../src/base/DefaultProviders.js';
+import { Transform } from '../../src/index.js';
 import {
   AppConfigDataClient,
   StartConfigurationSessionCommand,
diff --git a/packages/parameters/tests/unit/getParameter.test.ts b/packages/parameters/tests/unit/getParameter.test.ts
index 175f5e5f4..e02b2b887 100644
--- a/packages/parameters/tests/unit/getParameter.test.ts
+++ b/packages/parameters/tests/unit/getParameter.test.ts
@@ -3,8 +3,8 @@
  *
  * @group unit/parameters/ssm/getParameter/function
  */
-import { DEFAULT_PROVIDERS } from '../../src/base';
-import { SSMProvider, getParameter } from '../../src/ssm';
+import { DEFAULT_PROVIDERS } from '../../src/base/index.js';
+import { SSMProvider, getParameter } from '../../src/ssm/index.js';
 import { SSMClient, GetParameterCommand } from '@aws-sdk/client-ssm';
 import { mockClient } from 'aws-sdk-client-mock';
 import 'aws-sdk-client-mock-jest';
diff --git a/packages/parameters/tests/unit/getParameters.test.ts b/packages/parameters/tests/unit/getParameters.test.ts
index f1270b5a0..e8b0d7b43 100644
--- a/packages/parameters/tests/unit/getParameters.test.ts
+++ b/packages/parameters/tests/unit/getParameters.test.ts
@@ -3,8 +3,8 @@
  *
  * @group unit/parameters/ssm/getParameters/function
  */
-import { DEFAULT_PROVIDERS } from '../../src/base';
-import { SSMProvider, getParameters } from '../../src/ssm';
+import { DEFAULT_PROVIDERS } from '../../src/base/index.js';
+import { SSMProvider, getParameters } from '../../src/ssm/index.js';
 import { SSMClient, GetParametersByPathCommand } from '@aws-sdk/client-ssm';
 import { mockClient } from 'aws-sdk-client-mock';
 import 'aws-sdk-client-mock-jest';
diff --git a/packages/parameters/tests/unit/getParametersByName.test.ts b/packages/parameters/tests/unit/getParametersByName.test.ts
index e0c6201d2..e423dc350 100644
--- a/packages/parameters/tests/unit/getParametersByName.test.ts
+++ b/packages/parameters/tests/unit/getParametersByName.test.ts
@@ -3,9 +3,9 @@
  *
  * @group unit/parameters/ssm/getParametersByName/function
  */
-import { DEFAULT_PROVIDERS } from '../../src/base';
-import { SSMProvider, getParametersByName } from '../../src/ssm';
-import type { SSMGetParametersByNameOptions } from '../../src/types/SSMProvider';
+import { DEFAULT_PROVIDERS } from '../../src/base/index.js';
+import { SSMProvider, getParametersByName } from '../../src/ssm/index.js';
+import type { SSMGetParametersByNameOptions } from '../../src/types/SSMProvider.js';
 
 describe('Function: getParametersByName', () => {
   beforeEach(() => {
diff --git a/packages/parameters/tests/unit/getSecret.test.ts b/packages/parameters/tests/unit/getSecret.test.ts
index e1cf3b82e..da72fab48 100644
--- a/packages/parameters/tests/unit/getSecret.test.ts
+++ b/packages/parameters/tests/unit/getSecret.test.ts
@@ -3,8 +3,8 @@
  *
  * @group unit/parameters/SecretsProvider/getSecret/function
  */
-import { DEFAULT_PROVIDERS } from '../../src/base';
-import { SecretsProvider, getSecret } from '../../src/secrets';
+import { DEFAULT_PROVIDERS } from '../../src/base/index.js';
+import { SecretsProvider, getSecret } from '../../src/secrets/index.js';
 import {
   SecretsManagerClient,
   GetSecretValueCommand,
diff --git a/packages/parameters/tsconfig.esm.json b/packages/parameters/tsconfig.esm.json
new file mode 100644
index 000000000..9bed8e4da
--- /dev/null
+++ b/packages/parameters/tsconfig.esm.json
@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.esm.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "outDir": "./lib/esm",
+    "rootDir": "./src"
+  },
+  "include": [
+    "./src/**/*"
+  ]
+}
\ No newline at end of file
diff --git a/packages/parameters/tsconfig.json b/packages/parameters/tsconfig.json
index 1cb9d7277..5be842b9f 100644
--- a/packages/parameters/tsconfig.json
+++ b/packages/parameters/tsconfig.json
@@ -1,7 +1,7 @@
 {
     "extends": "../../tsconfig.json",
     "compilerOptions": {
-        "outDir": "./lib",
+        "outDir": "./lib/cjs/",
         "rootDir": "./src",
     },
     "include": [