diff --git a/types/options.d.ts b/types/options.d.ts
index 5079738a..24a95e32 100644
--- a/types/options.d.ts
+++ b/types/options.d.ts
@@ -47,7 +47,7 @@ export interface VueApolloQueryOptions<V, R> extends ExtendableVueApolloQueryOpt
 export interface VueApolloMutationOptions<V, R> extends MutationOptions<R> {
   mutation: DocumentNode;
   variables?: VariableFn<V>;
-  optimisticResponse?: ((this: ApolloVueThisType<V>) => any) | Object;
+  optimisticResponse?: ((this: ApolloVueThisType<V>) => R) | R;
   client?: String
 }