diff --git a/sdk/communication/communication-chat/src/generated/src/models/parameters.ts b/sdk/communication/communication-chat/src/generated/src/models/parameters.ts
index c4aa3b07905b..78187dd31ad5 100644
--- a/sdk/communication/communication-chat/src/generated/src/models/parameters.ts
+++ b/sdk/communication/communication-chat/src/generated/src/models/parameters.ts
@@ -183,7 +183,7 @@ export const createChatThreadRequest: OperationParameter = {
 export const repeatabilityRequestId: OperationParameter = {
   parameterPath: ["options", "repeatabilityRequestId"],
   mapper: {
-    serializedName: "repeatability-Request-Id",
+    serializedName: "repeatability-request-id",
     type: {
       name: "String"
     }
diff --git a/sdk/communication/communication-chat/swagger/README.md b/sdk/communication/communication-chat/swagger/README.md
index 61b15286d146..0b5b1b255aa3 100644
--- a/sdk/communication/communication-chat/swagger/README.md
+++ b/sdk/communication/communication-chat/swagger/README.md
@@ -11,7 +11,7 @@ description: Chat Client
 generate-metadata: false
 license-header: MICROSOFT_MIT_NO_VERSION
 output-folder: ../src/generated
-input-file: https://int.chatgateway.trafficmanager.net/swagger/2021-03-07/swagger.json
+input-file: https://raw.githubusercontent.com/Azure/azure-rest-api-specs/master/specification/communication/data-plane/Microsoft.CommunicationServicesChat/stable/2021-03-07/communicationserviceschat.json
 model-date-time-as-string: false
 optional-response-headers: true
 use-extension:
diff --git a/sdk/communication/communication-chat/test/chatClient.mocked.spec.ts b/sdk/communication/communication-chat/test/chatClient.mocked.spec.ts
index aa359e6a31bc..d7e8802d5d4b 100644
--- a/sdk/communication/communication-chat/test/chatClient.mocked.spec.ts
+++ b/sdk/communication/communication-chat/test/chatClient.mocked.spec.ts
@@ -60,7 +60,7 @@ describe("[Mocked] ChatClient", async () => {
     assert.equal(request.url, `${baseUri}/chat/threads?api-version=${API_VERSION}`);
     assert.equal(request.method, "POST");
     assert.deepEqual(JSON.parse(request.body), sendRequest);
-    assert.isNotEmpty(request.headers.get("repeatability-Request-Id"));
+    assert.isNotEmpty(request.headers.get("repeatability-request-id"));
   });
 
   it("makes successful list threads request", async () => {