diff --git a/services/dynamodb/src/main/resources/codegen-resources/dynamodbstreams/customization.config b/services/dynamodb/src/main/resources/codegen-resources/dynamodbstreams/customization.config
index cde0b3afc695..41847465bbc3 100644
--- a/services/dynamodb/src/main/resources/codegen-resources/dynamodbstreams/customization.config
+++ b/services/dynamodb/src/main/resources/codegen-resources/dynamodbstreams/customization.config
@@ -1,31 +1,17 @@
 {
     "calculateCrc32FromCompressedData": true,
-    "sdkModeledExceptionBaseClassName": "DynamoDbException",
-
-    // exclude these shapes that are already present in the dynamodb client
     "shapeModifiers": {
-        "AttributeValue" : {
-            "excludeShape": true
-        },
-        "KeySchemaElement" : {
-            "excludeShape": true
-        },
-        "KeyType" : {
-            "excludeShape": true
-        },
-        "StreamViewType" : {
-            "excludeShape": true
-        },
-        "InternalServerError" : {
-            "excludeShape": true
-        },
-        "LimitExceededException" : {
-            "excludeShape": true
-        },
-        "ResourceNotFoundException" : {
-            "excludeShape": true
-        }
+      "AttributeValue": {
+          "modify": [
+              {
+                  "NULL": {
+                      "emitPropertyName": "NUL"
+                  }
+              }
+          ]
+      }
     },
+    "sdkModeledExceptionBaseClassName": "DynamoDbException",
     "shareModelConfig" : {
         "shareModelWith" : "dynamodb",
         "packageName" : "streams"