diff --git a/.changes/next-release/bugfix-ecs-fe04eed4.json b/.changes/next-release/bugfix-ecs-fe04eed4.json
new file mode 100644
index 0000000000..84b2113f3a
--- /dev/null
+++ b/.changes/next-release/bugfix-ecs-fe04eed4.json
@@ -0,0 +1,5 @@
+{
+  "type": "bugfix",
+  "category": "ecs",
+  "description": "adds the missing appProtocol and name parameters to the AwsEcsTaskDefinitionContainerDefinitionsPortMappingsDetails type definition in order to support Service Connect."
+}
\ No newline at end of file
diff --git a/apis/securityhub-2018-10-26.normal.json b/apis/securityhub-2018-10-26.normal.json
index 6a49917d27..23dc03e7d6 100644
--- a/apis/securityhub-2018-10-26.normal.json
+++ b/apis/securityhub-2018-10-26.normal.json
@@ -7364,9 +7364,21 @@
         "shape": "AwsEcsTaskDefinitionContainerDefinitionsMountPointsDetails"
       }
     },
+    "AppProtocol": {
+      "type": "string",
+      "enum": [
+        "http",
+        "http2",
+        "grpc"
+      ]
+    },
     "AwsEcsTaskDefinitionContainerDefinitionsPortMappingsDetails": {
       "type": "structure",
       "members": {
+        "AppProtocol": {
+          "shape": "AppProtocol",
+          "documentation": "<p>The application protocol that's used for the port mapping. This parameter only applies to Service Connect.</p>"
+        },
         "ContainerPort": {
           "shape": "Integer",
           "documentation": "<p>The port number on the container that is bound to the user-specified or automatically assigned host port.</p>"
@@ -7375,6 +7387,10 @@
           "shape": "Integer",
           "documentation": "<p>The port number on the container instance to reserve for the container.</p>"
         },
+        "Name": {
+          "shape": "NonEmptyString",
+          "documentation": "<p>The name that's used for the port mapping. This parameter only applies to Service Connect.</p>"
+        },
         "Protocol": {
           "shape": "NonEmptyString",
           "documentation": "<p>The protocol used for the port mapping. The default is <code>tcp</code>.</p>"
diff --git a/clients/securityhub.d.ts b/clients/securityhub.d.ts
index e1a6729d92..e061509aa6 100644
--- a/clients/securityhub.d.ts
+++ b/clients/securityhub.d.ts
@@ -4932,7 +4932,12 @@ declare namespace SecurityHub {
     SourceVolume?: NonEmptyString;
   }
   export type AwsEcsTaskDefinitionContainerDefinitionsMountPointsList = AwsEcsTaskDefinitionContainerDefinitionsMountPointsDetails[];
+  export type AppProtocol = "http"|"http2"|"grpc"|string;
   export interface AwsEcsTaskDefinitionContainerDefinitionsPortMappingsDetails {
+    /**
+     * The application protocol that's used for the port mapping. This parameter only applies to Service Connect.
+     */
+    AppProtocol?: AppProtocol;
     /**
      * The port number on the container that is bound to the user-specified or automatically assigned host port.
      */
@@ -4941,6 +4946,10 @@ declare namespace SecurityHub {
      * The port number on the container instance to reserve for the container.
      */
     HostPort?: Integer;
+    /**
+     * The name that's used for the port mapping. This parameter only applies to Service Connect.
+     */
+    Name?: NonEmptyString;
     /**
      * The protocol used for the port mapping. The default is tcp.
      */