diff --git a/CHANGELOG.md b/CHANGELOG.md
index d63987112b6..485f24f6777 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,39 @@
 # Changelog
 
+## [0.4.0-alpha] - 08/26/2021
+
+**WARNING: Alpha releases may contain bugs and no guarantee is made about API stability. They are not recommended for production use!**
+
+### Services new in this release
+
+* ec2
+* location
+* marketplacecommerceanalytics
+
+### New features
+
+* Support for presigning requests (smithy-kotlin#435)
+* Detect aws region from system properties (aws-sdk-kotlin#202)
+* EC2 Query Protocol (aws-sdk-kotlin#230)
+* Provide opt-in wire logging (smithy-kotlin#425)
+* Support profile credentials provider (smithy-kotlin#302)
+
+### Fixes
+
+* s3.deleteObjects causes an exception (aws-sdk-kotlin#125)
+* Streaming request BodyStream never read (aws-sdk-kotlin#282)
+* location service references traits not in sdk classpath (aws-sdk-kotlin#286)
+* Ignore unboxed types for subset of services (aws-sdk-kotlin#261)
+* Service operations specifying no auth should not sign requests with sigv4 (aws-sdk-kotlin#263)
+* Create S3 object with Unicode name fails with signature mismatch (aws-sdk-kotlin#200)
+* Codegen errors in marketplacecommerceanalytics (aws-sdk-kotlin#214)
+* Escape model-extra files for Windows (aws-sdk-kotlin#191)
+* Support Glacier APIVersion Header (smithy-kotlin#165)
+* Support APIGateway Accept Header (smithy-kotlin#157)
+* Add support for awsQueryError trait (smithy-kotlin#375)
+* S3 HeadObject errors require customization (aws-sdk-kotlin#152)
+* S3 custom treatment of GetBucketLocation response (aws-sdk-kotlin#194)
+
 ## [0.3.0-M2] - 06/18/2021
 
 **WARNING: Beta releases may contain bugs and no guarantee is made about API stability. They are not recommended for production use!**
diff --git a/examples/build.gradle.kts b/examples/build.gradle.kts
index 4a05c1abdc6..7745f6a5e70 100644
--- a/examples/build.gradle.kts
+++ b/examples/build.gradle.kts
@@ -4,7 +4,7 @@ plugins {
 
 allprojects {
     group = "aws.sdk.kotlin.example"
-    version = "0.4.0-SNAPSHOT"
+    version = "0.4.0-alpha"
 
     repositories {
         mavenLocal()
diff --git a/examples/gradle.properties b/examples/gradle.properties
index 00bcba92ef3..cba025e435d 100644
--- a/examples/gradle.properties
+++ b/examples/gradle.properties
@@ -1,3 +1,3 @@
 
 # AWS SDK
-awsSdkKotlinVersion=0.4.0-SNAPSHOT
+awsSdkKotlinVersion=0.4.0-alpha
diff --git a/gradle.properties b/gradle.properties
index 71c726bab0d..5d2f04bceb6 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -7,13 +7,13 @@ kotlin.native.ignoreDisabledTargets=true
 org.gradle.jvmargs=-Xmx6g -XX:MaxPermSize=6g -XX:MaxMetaspaceSize=1G
 
 # sdk
-sdkVersion=0.4.0-SNAPSHOT
+sdkVersion=0.4.0-alpha
 
 # codegen
 smithyVersion=1.9.1
 smithyGradleVersion=0.5.3
 # smithy-kotlin codegen and runtime are versioned together
-smithyKotlinVersion=0.4.0-SNAPSHOT
+smithyKotlinVersion=0.4.0-alpha
 
 # kotlin
 kotlinVersion=1.5.20
@@ -27,7 +27,7 @@ coroutinesVersion=1.5.0
 atomicFuVersion=0.16.1
 
 # crt
-crtKotlinVersion=0.4.0-SNAPSHOT
+crtKotlinVersion=0.4.0-alpha
 
 # testing/utility
 junitVersion=5.6.2