diff --git a/packages/redux-devtools-extension/src/utils/assign.ts b/packages/redux-devtools-extension/src/utils/assign.ts
index b9588369..c0a193ef 100644
--- a/packages/redux-devtools-extension/src/utils/assign.ts
+++ b/packages/redux-devtools-extension/src/utils/assign.ts
@@ -8,7 +8,7 @@ const objectKeys =
     return keys;
   };
 
-export default function assign<T, K extends keyof T>(
+export default function assign<T extends object, K extends keyof T>(
   obj: T,
   newKey: K,
   newValue: T[K]