diff --git a/types/lodash/common/lang.d.ts b/types/lodash/common/lang.d.ts
index cbfe0e56bb..14b00747a0 100644
--- a/types/lodash/common/lang.d.ts
+++ b/types/lodash/common/lang.d.ts
@@ -1231,7 +1231,7 @@ declare module "../index" {
         /**
          * see _.isObject
          */
-        isObject(): boolean;
+        isObject(): this is LoDashImplicitWrapper<object>;
     }
 
     interface LoDashExplicitWrapper<TValue> {