diff --git a/plugins/search-backend-module-stack-overflow-collator/src/collators/StackOverflowQuestionsCollatorFactory.ts b/plugins/search-backend-module-stack-overflow-collator/src/collators/StackOverflowQuestionsCollatorFactory.ts
index e8c7b41781..33ceb4f870 100644
--- a/plugins/search-backend-module-stack-overflow-collator/src/collators/StackOverflowQuestionsCollatorFactory.ts
+++ b/plugins/search-backend-module-stack-overflow-collator/src/collators/StackOverflowQuestionsCollatorFactory.ts
@@ -40,7 +40,7 @@ export interface StackOverflowDocument extends IndexableDocument {
  * @public
  */
 export type StackOverflowQuestionsRequestParams = {
-  [key: string]: string | string[] | number | null;
+  [key: string]: string | string[] | number;
 };
 
 /**