diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80213c5d9c6..a920df397c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Smithy Typescript Codegen Changelog
 
+## 0.21.1 (2024-06-05)
+
+### Features
+
+- Added logging for `CredentialsProviderError` ([#1290](https://github.com/smithy-lang/smithy-typescript/pull/1290))
+
+### Bug Fixes
+
+- Fixed issues with serializing millisecond precision timestamps for certain formats ([#1289](https://github.com/smithy-lang/smithy-typescript/pull/1289),
+  [#1295](https://github.com/smithy-lang/smithy-typescript/pull/1295))
+- Fixed issue where `export` was used instead of the clearer `export type` ([#1284](https://github.com/smithy-lang/smithy-typescript/pull/1284))
+
 ## 0.21.0 (2024-05-22)
 
 ### Breaking Changes
diff --git a/README.md b/README.md
index 3a9be2ddb93..9264ce3099d 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ To add a minimal `typescript-client-codegen` plugin, add the following to `smith
     // Add the Smithy TypeScript code generator dependency
     "maven": {
         "dependencies": [
-            "software.amazon.smithy.typescript:smithy-typescript-codegen:0.21.0"
+            "software.amazon.smithy.typescript:smithy-typescript-codegen:0.21.1"
         ]
     },
     "plugins": {
@@ -141,7 +141,7 @@ dependencies {
     smithyCli("software.amazon.smithy:smithy-cli:$smithyVersion")
 
     // Add the Smithy TypeScript code generator dependency
-    implementation("software.amazon.smithy.typescript:smithy-typescript-codegen:0.21.0")
+    implementation("software.amazon.smithy.typescript:smithy-typescript-codegen:0.21.1")
 
     // Uncomment below to add various smithy dependencies (see full list of smithy dependencies in https://github.com/awslabs/smithy)
     // implementation("software.amazon.smithy:smithy-model:$smithyVersion")
diff --git a/build.gradle.kts b/build.gradle.kts
index 42fb5c13387..5e8c91a3e6d 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -28,7 +28,7 @@ plugins {
 
 allprojects {
     group = "software.amazon.smithy.typescript"
-    version = "0.21.0"
+    version = "0.21.1"
 }
 
 // The root project doesn't produce a JAR.