diff --git a/packages/progress/index.ts b/packages/progress/index.ts
index becb6233..e048a54d 100644
--- a/packages/progress/index.ts
+++ b/packages/progress/index.ts
@@ -25,8 +25,9 @@ VantComponent({
       value: '#fff',
     },
     strokeWidth: {
-      type: null,
+      type: Number,
       value: 4,
+      optionalTypes: [String],
     },
   },