diff --git a/mutation/index.ts b/mutation/index.ts
index 1dee32b06..2e980de1d 100644
--- a/mutation/index.ts
+++ b/mutation/index.ts
@@ -15,8 +15,7 @@ import {
   MutationFetcher
 } from './types'
 
-const mutation =
-  <Data, Error>() =>
+const mutation = (<Data, Error>() =>
   (
     key: Key,
     fetcher: MutationFetcher<Data>,
@@ -112,11 +111,8 @@ const mutation =
         return currentState.isMutating
       }
     }
-  }
+  }) as unknown as Middleware
 
-export default withMiddleware(
-  useSWR,
-  mutation as unknown as Middleware
-) as unknown as SWRMutationHook
+export default withMiddleware(useSWR, mutation) as unknown as SWRMutationHook
 
-export { SWRMutationConfiguration, SWRMutationResponse }
+export { SWRMutationConfiguration, SWRMutationResponse, SWRMutationHook }
diff --git a/package.json b/package.json
index a3c20a238..b7a8402a2 100644
--- a/package.json
+++ b/package.json
@@ -98,7 +98,7 @@
     "@types/react": "17.0.20",
     "@typescript-eslint/eslint-plugin": "5.8.0",
     "@typescript-eslint/parser": "5.8.0",
-    "bunchee": "1.8.2",
+    "bunchee": "1.8.3",
     "eslint": "8.3.0",
     "eslint-config-prettier": "8.3.0",
     "eslint-plugin-jest-dom": "3.9.2",
diff --git a/yarn.lock b/yarn.lock
index d3f7d073b..f443e8dae 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2296,10 +2296,10 @@ builtin-modules@^3.1.0:
   resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-3.2.0.tgz#45d5db99e7ee5e6bc4f362e008bf917ab5049887"
   integrity sha512-lGzLKcioL90C7wMczpkY0n/oART3MbBa8R9OFGE1rJxoVI86u4WAGfEk8Wjv10eKSyTHVGkSo3bvBylCEtk7LA==
 
-bunchee@1.8.2:
-  version "1.8.2"
-  resolved "https://registry.yarnpkg.com/bunchee/-/bunchee-1.8.2.tgz#7423e40de5635640c7c792322baf1089f51ca3e0"
-  integrity sha512-i8NfUIQcC7VIGbninHTzM/PnEHD+b0pkCcSMVKb5N8nAK6On32f2N3vHczzYk0FcwxuIt27r2zB0yTMErLTfSA==
+bunchee@1.8.3:
+  version "1.8.3"
+  resolved "https://registry.yarnpkg.com/bunchee/-/bunchee-1.8.3.tgz#430f1c741b8d048ce158ee883e2f4389380b13f8"
+  integrity sha512-/kaA+TGhX75AUoGf5u/6KHqYIJjL8UEfCfnVS11cKjZB83NXWZGYMC2/vJhj1CkjBmr3xNoafuiDT6QY0WU7Kw==
   dependencies:
     "@rollup/plugin-babel" "5.2.1"
     "@rollup/plugin-commonjs" "20.0.0"
@@ -6262,6 +6262,7 @@ supports-hyperlinks@^2.0.0:
 
 "swr@link:.":
   version "0.0.0"
+  uid ""
 
 symbol-observable@^1.1.0:
   version "1.2.0"