diff --git a/packages/@aws-cdk/cfnspec/CHANGELOG.md b/packages/@aws-cdk/cfnspec/CHANGELOG.md
index 9d2b6815ee159..a7c70ef7540e1 100644
--- a/packages/@aws-cdk/cfnspec/CHANGELOG.md
+++ b/packages/@aws-cdk/cfnspec/CHANGELOG.md
@@ -5,6 +5,12 @@
 * AWS::SageMaker is at 51.0.0
 
 
+## Unapplied changes
+
+* AWS::ECS is at 51.0.0
+* AWS::SageMaker is at 51.0.0
+
+
 ## Unapplied changes
 
 * AWS::ECS is at 51.0.0