diff --git a/package.json b/package.json
index d99762e..bd44cde 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "http-react",
-  "version": "3.6.4",
+  "version": "3.6.6",
   "description": "React hooks for data fetching",
   "main": "dist/index.js",
   "scripts": {
diff --git a/src/hooks/use-fetch.ts b/src/hooks/use-fetch.ts
index c752721..5fad1ce 100644
--- a/src/hooks/use-fetch.ts
+++ b/src/hooks/use-fetch.ts
@@ -980,8 +980,9 @@ export function useFetch<FetchDataType = any, BodyType = any>(
 
       if (isMutating) {
         if (serialize($data) !== serialize(cacheForMutation.get(resolvedKey))) {
-          cacheForMutation.set(idString, data)
+          cacheForMutation.set(idString, $data)
           if (isMutating) {
+            forceMutate($data)
             if (handleMutate) {
               if (url === '') {
                 ;(onMutate as any)($data, imperativeFetch)
diff --git a/src/utils/shared.ts b/src/utils/shared.ts
index be7ecee..6e2691a 100644
--- a/src/utils/shared.ts
+++ b/src/utils/shared.ts
@@ -194,7 +194,6 @@ export function $searchParams<T = any>(input: string) {
 
   const parsedParams = new Map()
 
-  // @ts-expect-error
   for (let key of allKeys) {
     const allValues = searchParams.getAll(key)
 
diff --git a/tsconfig.json b/tsconfig.json
index 18736d8..9737e95 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "ES5",
+    "target": "ES2015",
     "outDir": "./dist",
     "module": "CommonJS",
     "lib": ["es6", "dom", "es2019"],