diff --git a/langs/vlang.yaml b/langs/vlang.yaml
index 592b2ed..cd661bf 100644
--- a/langs/vlang.yaml
+++ b/langs/vlang.yaml
@@ -21,7 +21,7 @@ compile: |
 
 format:
   run: |
-    v fmt main.v
+    v fmt -w main.v
   input: |
     fn main() {
       println('hello world')