diff --git a/localForage/localForage.d.ts b/localForage/localForage.d.ts
index eaafd8b8c8..ca5c5e2eda 100644
--- a/localForage/localForage.d.ts
+++ b/localForage/localForage.d.ts
@@ -12,7 +12,7 @@ interface LocalForageOptions {
 
     storeName?: string;
 
-    version?: string;
+    version?: number;
 
     description?: string;
 }