diff --git a/integration/grpc-web-no-streaming-observable/example.ts b/integration/grpc-web-no-streaming-observable/example.ts
index 384b0a7b1..cbe5fdb30 100644
--- a/integration/grpc-web-no-streaming-observable/example.ts
+++ b/integration/grpc-web-no-streaming-observable/example.ts
@@ -369,6 +369,7 @@ export class GrpcWebImpl {
 
     debug?: boolean;
     metadata?: grpc.Metadata;
+    upStreamRetryCodes?: number[];
   };
 
   constructor(
@@ -378,6 +379,7 @@ export class GrpcWebImpl {
 
       debug?: boolean;
       metadata?: grpc.Metadata;
+      upStreamRetryCodes?: number[];
     }
   ) {
     this.host = host;
diff --git a/integration/grpc-web-no-streaming/example.ts b/integration/grpc-web-no-streaming/example.ts
index ce091737e..fc55f0152 100644
--- a/integration/grpc-web-no-streaming/example.ts
+++ b/integration/grpc-web-no-streaming/example.ts
@@ -367,6 +367,7 @@ export class GrpcWebImpl {
 
     debug?: boolean;
     metadata?: grpc.Metadata;
+    upStreamRetryCodes?: number[];
   };
 
   constructor(
@@ -376,6 +377,7 @@ export class GrpcWebImpl {
 
       debug?: boolean;
       metadata?: grpc.Metadata;
+      upStreamRetryCodes?: number[];
     }
   ) {
     this.host = host;
diff --git a/integration/grpc-web/example.ts b/integration/grpc-web/example.ts
index 54bf53348..4a4ad64b4 100644
--- a/integration/grpc-web/example.ts
+++ b/integration/grpc-web/example.ts
@@ -807,6 +807,7 @@ export class GrpcWebImpl {
     streamingTransport?: grpc.TransportFactory;
     debug?: boolean;
     metadata?: grpc.Metadata;
+    upStreamRetryCodes?: number[];
   };
 
   constructor(
@@ -816,6 +817,7 @@ export class GrpcWebImpl {
       streamingTransport?: grpc.TransportFactory;
       debug?: boolean;
       metadata?: grpc.Metadata;
+      upStreamRetryCodes?: number[];
     }
   ) {
     this.host = host;
@@ -858,8 +860,7 @@ export class GrpcWebImpl {
     _request: any,
     metadata: grpc.Metadata | undefined
   ): Observable<any> {
-    // Status Response Codes (https://developers.google.com/maps-booking/reference/grpc-api/status_codes)
-    const upStreamCodes = [2, 4, 8, 9, 10, 13, 14, 15];
+    const upStreamCodes = this.options.upStreamRetryCodes || [];
     const DEFAULT_TIMEOUT_TIME: number = 3_000;
     const request = { ..._request, ...methodDesc.requestType };
     const maybeCombinedMetadata =
diff --git a/src/generate-grpc-web.ts b/src/generate-grpc-web.ts
index a4c2639de..435759298 100644
--- a/src/generate-grpc-web.ts
+++ b/src/generate-grpc-web.ts
@@ -195,6 +195,7 @@ function generateGrpcWebImpl(ctx: Context, returnObservable: boolean, hasStreami
       ${hasStreamingMethods ? 'streamingTransport?: grpc.TransportFactory,' : ``}
       debug?: boolean,
       metadata?: grpc.Metadata,
+      upStreamRetryCodes?: number[],
     }
   `;
 
@@ -299,8 +300,7 @@ function createInvokeMethod(ctx: Context) {
       _request: any,
       metadata: grpc.Metadata | undefined
     ): ${observableType(ctx)}<any> {
-      // Status Response Codes (https://developers.google.com/maps-booking/reference/grpc-api/status_codes)
-      const upStreamCodes = [2, 4, 8, 9, 10, 13, 14, 15]; 
+      const upStreamCodes = this.options.upStreamRetryCodes || [];
       const DEFAULT_TIMEOUT_TIME: number = 3_000;
       const request = { ..._request, ...methodDesc.requestType };
       const maybeCombinedMetadata =