diff --git a/types/react-loadable/index.d.ts b/types/react-loadable/index.d.ts
index 2e38f58c39..b499eb4b21 100644
--- a/types/react-loadable/index.d.ts
+++ b/types/react-loadable/index.d.ts
@@ -66,7 +66,7 @@ declare namespace LoadableExport {
          * });
          * ```
          */
-        webpack?: () => number[];
+        webpack?: () => Array<string | number>;
     }
 
     interface OptionsWithoutRender<Props> extends CommonOptions {