diff --git a/docs/en/installation.md b/docs/en/installation.md
index 16c2e49..033b291 100644
--- a/docs/en/installation.md
+++ b/docs/en/installation.md
@@ -34,7 +34,7 @@ function Page() {
     mutationFn: () => Promise.resolve(),
     optimisticUpdateOptions: {
       queryKey: ["todos"],
-      optimisticUpdatesFn: ({ prevQueryData, variables }: { prevQueryData: Todo[]; variables: Todo }) => {
+      getOptimisticState: ({ prevQueryData, variables }: { prevQueryData: Todo[]; variables: Todo }) => {
         return [...prevQueryData, variables];
       },
       invalidateQueryOnSuccess: true
diff --git a/docs/en/react/useOptimisticMutation.md b/docs/en/react/useOptimisticMutation.md
index d3d4df1..5a39393 100644
--- a/docs/en/react/useOptimisticMutation.md
+++ b/docs/en/react/useOptimisticMutation.md
@@ -21,7 +21,7 @@ const {
   mutationFn: addTodo,
   optimisticUpdateOptions: {
     queryKey: ["todos"],
-    optimisticUpdatesFn: ({ prevQueryData, variables }) => {
+    getOptimisticState: ({ prevQueryData, variables }) => {
       return [...prevQueryData, variables];
     },
     invalidateQueryOnSuccess: true
@@ -43,7 +43,7 @@ This parameter extends the original UseMutationOptions. All original options are
     - Defaults to `false`
     - Whether to invalidate the query after a successful mutation
     - If set to `true`, the query will fetch if the data is stale.
-  - `optimisticUpdatesFn: { prevQueryData: TQueryData; variables: TVariables }) => TQueryData;`
+  - `getOptimisticState: { prevQueryData: TQueryData; variables: TVariables }) => TQueryData;`
     - This function returns the state for optimistic updates.
 
 ## queryClient