diff --git a/common/reducers/index.ts b/common/reducers/index.ts
index 73122d55..e29992df 100644
--- a/common/reducers/index.ts
+++ b/common/reducers/index.ts
@@ -28,7 +28,7 @@ export interface AppState {
   transaction: TransactionState;
 }
 
-export default combineReducers({
+export default combineReducers<AppState>({
   config,
   swap,
   notifications,