diff --git a/sdk/iot/modelsrepository/src/fetcherAbstract.ts b/sdk/iot/modelsrepository/src/fetcherAbstract.ts
index f42e12698eee..ef0ba19cb473 100644
--- a/sdk/iot/modelsrepository/src/fetcherAbstract.ts
+++ b/sdk/iot/modelsrepository/src/fetcherAbstract.ts
@@ -2,7 +2,8 @@
 // Licensed under the MIT license.
 
 import { OperationOptions } from "@azure/core-client";
+import { DTDL } from "./internal";
 
 export abstract class Fetcher {
-  abstract fetch(path: string, options: OperationOptions): any;
+  abstract fetch(path: string, options: OperationOptions): Promise<DTDL | DTDL[]>;
 }
diff --git a/sdk/iot/modelsrepository/src/fetcherFilesystem.ts b/sdk/iot/modelsrepository/src/fetcherFilesystem.ts
index 819e926fc15d..4b156561e24a 100644
--- a/sdk/iot/modelsrepository/src/fetcherFilesystem.ts
+++ b/sdk/iot/modelsrepository/src/fetcherFilesystem.ts
@@ -6,6 +6,15 @@ import * as path from "path";
 import { Fetcher, DTDL, logger } from "./internal";
 import {RestError, RestErrorOptions} from '@azure/core-rest-pipeline';
 
+function readFilePromise(path: string): Promise<string> {
+  return new Promise((res, rej) => {
+    fs.readFile(path, "utf8", (err, data) => {
+      err ? rej(err) : res(data);
+      return 0;
+    });
+  });
+}
+
 export class FilesystemFetcher extends Fetcher {
   private _baseFilePath: string;
 
@@ -14,14 +23,15 @@ export class FilesystemFetcher extends Fetcher {
     this._baseFilePath = baseFilePath;
   }
 
-  fetch(filePath: string) {
+  async fetch(filePath: string) {
     logger.info(`Fetching ${filePath} from local filesystem`);
     const absolutePath = path.join(this._baseFilePath, filePath);
 
     try {
       logger.info(`File open on ${absolutePath}`);
-      const dtdlFile = fs.readFileSync(absolutePath, "utf8");
-      const parsedDtdl: DTDL | DTDL[] = JSON.parse(dtdlFile);
+      const parsedDtdl: DTDL | DTDL[] = await readFilePromise(absolutePath).then((dtdlFile) => {
+        return JSON.parse(dtdlFile);
+      });
       return parsedDtdl;
     } catch (e) {
       // TODO: Is there a ResourceNotFound Error for Filesystem + Http (Generic API for errors)
diff --git a/sdk/iot/modelsrepository/src/modelsRepositoryServiceClient.ts b/sdk/iot/modelsrepository/src/modelsRepositoryServiceClient.ts
index d8d6759a1f99..469f0716f436 100644
--- a/sdk/iot/modelsrepository/src/modelsRepositoryServiceClient.ts
+++ b/sdk/iot/modelsrepository/src/modelsRepositoryServiceClient.ts
@@ -2,6 +2,7 @@
 // Licensed under the MIT license.
 
 import { ServiceClientOptions, ServiceClient } from "@azure/core-client";
+import { DEFAULT_API_VERSION } from "./internal";
 
 interface IoTModelsRepositoryServiceClientOptions extends ServiceClientOptions {
   version?: string;
@@ -31,6 +32,6 @@ export class IoTModelsRepositoryServiceClient extends ServiceClient {
     super(optionsWithDefaults);
 
     this.url = url;
-    this.version = options.version || "2019-02-02";
+    this.version = options.version || DEFAULT_API_VERSION;
   }
 }