diff --git a/packages/@aws-cdk/cfnspec/CHANGELOG.md b/packages/@aws-cdk/cfnspec/CHANGELOG.md
index c0aadd575e720..878604573f76b 100644
--- a/packages/@aws-cdk/cfnspec/CHANGELOG.md
+++ b/packages/@aws-cdk/cfnspec/CHANGELOG.md
@@ -1,3 +1,21 @@
+
+# Serverless Application Model (SAM) Resource Specification v2016-10-31
+
+## New Resource Types
+
+
+## Attribute Changes
+
+
+## Property Changes
+
+* AWS::Serverless::Api Models.PrimitiveItemType (__changed__)
+  * Old: String
+  * New: Map
+
+## Property Type Changes
+
+
 # CloudFormation Resource Specification v109.0.0
 
 ## New Resource Types
diff --git a/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json b/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json
index cedf2b0bc1e79..a6d72e218bb7c 100644
--- a/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json
+++ b/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json
@@ -2255,7 +2255,7 @@
                 },
                 "Models": {
                     "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-resource-api.html#sam-api-models",
-                    "PrimitiveItemType": "String",
+                    "PrimitiveItemType": "Map",
                     "Required": false,
                     "Type": "Map",
                     "UpdateType": "Immutable"