diff --git a/src/types.ts b/src/types.ts
index cb0662fc9..d768cf50d 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -90,11 +90,20 @@ export type Mutator<Data = any> = (
   shouldRevalidate?: boolean
 ) => Promise<Data | undefined>
 
-export type ScopedMutator<Data> = (
-  key: Key,
-  data?: Data | Promise<Data> | MutatorCallback<Data>,
-  shouldRevalidate?: boolean
-) => Promise<Data | undefined>
+export interface ScopedMutator<Data = any> {
+  /** This is used for bound mutator */
+  (
+    key: Key,
+    data?: Data | Promise<Data> | MutatorCallback<Data>,
+    shouldRevalidate?: boolean
+  ): Promise<Data | undefined>
+  /** This is used for global mutator */
+  <T = any>(
+    key: Key,
+    data?: T | Promise<T> | MutatorCallback<T>,
+    shouldRevalidate?: boolean
+  ): Promise<T | undefined>
+}
 
 export type KeyedMutator<Data> = (
   data?: Data | Promise<Data> | MutatorCallback<Data>,
diff --git a/src/use-swr.ts b/src/use-swr.ts
index 1028eba83..27bf9452d 100644
--- a/src/use-swr.ts
+++ b/src/use-swr.ts
@@ -700,7 +700,8 @@ Object.defineProperty(SWRConfig, 'default', {
 export const mutate = internalMutate.bind(
   null,
   defaultConfig.cache
-) as ScopedMutator<any>
+) as ScopedMutator
+
 export function createCache<Data>(
   provider: Cache
 ): {
@@ -713,5 +714,4 @@ export function createCache<Data>(
     mutate: internalMutate.bind(null, cache) as ScopedMutator<Data>
   }
 }
-
 export default useSWR
diff --git a/yarn.lock b/yarn.lock
index b9813d796..d1229b212 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3529,9 +3529,9 @@ has@^1.0.3:
     function-bind "^1.1.1"
 
 hosted-git-info@^2.1.4:
-  version "2.8.5"
-  resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.5.tgz#759cfcf2c4d156ade59b0b2dfabddc42a6b9c70c"
-  integrity sha512-kssjab8CvdXfcXMXVcvsXum4Hwdq9XGtRD3TteMEvEbq0LXyiNQr6AprqKqfeaDXze7SxWvRxdpwE6ku7ikLkg==
+  version "2.8.9"
+  resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.9.tgz#dffc0bf9a21c02209090f2aa69429e1414daf3f9"
+  integrity sha512-mxIDAb9Lsm6DoOJ7xH+5+X4y1LU/4Hi50L9C5sIswK3JzULS4bwk1FvjdBgvYR4bzT4tuUQiC15FE2f5HbLvYw==
 
 html-encoding-sniffer@^1.0.2:
   version "1.0.2"