diff --git a/backend/windmill-worker/nsjail/run.bun.config.proto b/backend/windmill-worker/nsjail/run.bun.config.proto
index ce4041c262..a9b34e285d 100644
--- a/backend/windmill-worker/nsjail/run.bun.config.proto
+++ b/backend/windmill-worker/nsjail/run.bun.config.proto
@@ -138,6 +138,7 @@ mount {
     dst: "/tmp/windmill/cache/bun"
     is_bind: true
     mandatory: false
+    rw: true
 }
 
 {SHARED_MOUNT}