diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index dbfff79..f3bc694 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -54,13 +54,6 @@ If you have updated the generated chat code you'll have to fix the following iss
 
 - Add `/** @ts-expect-error */ ` (make sure to use this exact comment format otherwise they will be missing from `d.ts` files) for imports for `ImageSizeRequest`, `OnlyUserIDRequest` in the `gen/chat/FilesApi.ts` and `gen/chat/MessagesApi.ts` files
 - Add `/** @ts-expect-error */ ` (make sure to use this exact comment format otherwise they will be missing from `d.ts` files) for duplicate exports in `gen/chat/index.ts`
-- Fix the query param serizalization in the `gen/chat/MessagesApi.ts` file's `getManyMessagesRaw` function. This is the correct serialization:
-
-```typescript
-if (requestParameters.ids) {
-  queryParameters["ids"] = requestParameters.ids.join(",");
-}
-```
 
 ### Validate that the generated code works
 
diff --git a/src/StreamClient.ts b/src/StreamClient.ts
index 6d4f090..ebb4ad3 100644
--- a/src/StreamClient.ts
+++ b/src/StreamClient.ts
@@ -517,18 +517,18 @@ export class StreamClient {
       queryParamsStringify: (params: HTTPQuery) => {
         const newParams = [];
         for (const k in params) {
-          if (Array.isArray(params[k]) || typeof params[k] === 'object') {
-            newParams.push(
-              `${k}=${encodeURIComponent(JSON.stringify(params[k]))}`,
-            );
+          const param = params[k];
+          if (Array.isArray(param)) {
+            newParams.push(`${k}=${encodeURIComponent(param.join(','))}`);
+          } else if (typeof param === 'object') {
+            newParams.push(`${k}=${encodeURIComponent(JSON.stringify(param))}`);
           } else {
-            const value = params[k];
             if (
-              typeof value === 'string' ||
-              typeof value === 'number' ||
-              typeof value === 'boolean'
+              typeof param === 'string' ||
+              typeof param === 'number' ||
+              typeof param === 'boolean'
             ) {
-              newParams.push(`${k}=${encodeURIComponent(value)}`);
+              newParams.push(`${k}=${encodeURIComponent(param)}`);
             }
           }
         }
diff --git a/src/gen/chat/apis/MessagesApi.ts b/src/gen/chat/apis/MessagesApi.ts
index 42650c1..26d04ca 100644
--- a/src/gen/chat/apis/MessagesApi.ts
+++ b/src/gen/chat/apis/MessagesApi.ts
@@ -462,7 +462,7 @@ export class MessagesApi extends runtime.BaseAPI {
         const queryParameters: any = {};
 
         if (requestParameters.ids) {
-            queryParameters['ids'] = requestParameters.ids.join(',');
+            queryParameters['ids'] = requestParameters.ids;
         }
 
         const headerParameters: runtime.HTTPHeaders = {};