diff --git a/google-cloud-container_analysis/CHANGELOG.md b/google-cloud-container_analysis/CHANGELOG.md
index 07dad3f8153e..88c69799e98d 100644
--- a/google-cloud-container_analysis/CHANGELOG.md
+++ b/google-cloud-container_analysis/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Release History
 
+### 0.4.0 / 2019-10-29
+
+This release require Ruby 2.4 or later.
+
+#### Features
+
+* Use new grafeas gem instead of grafeas-client.
+
+#### Documentation
+
+* Clarify which Google Cloud Platform products support auto-discovered credentials
+
 ### 0.3.2 / 2019-10-07
 
 #### Features
diff --git a/google-cloud-container_analysis/lib/google/cloud/container_analysis/version.rb b/google-cloud-container_analysis/lib/google/cloud/container_analysis/version.rb
index 1c24d8f59d37..649744e5f101 100644
--- a/google-cloud-container_analysis/lib/google/cloud/container_analysis/version.rb
+++ b/google-cloud-container_analysis/lib/google/cloud/container_analysis/version.rb
@@ -16,7 +16,7 @@
 module Google
   module Cloud
     module ContainerAnalysis
-      VERSION = "0.3.2".freeze
+      VERSION = "0.4.0".freeze
     end
   end
 end