diff --git a/resource-provider/server.js b/resource-provider/server.js
index 51d2ece..c999125 100644
--- a/resource-provider/server.js
+++ b/resource-provider/server.js
@@ -106,7 +106,8 @@ app.delete(
       }
 
       // Validate filename format (basic security check)
-      if (!filename.test(/^F_S\d+_T\d+_RV\d+\.md$/)) {
+      const pattern = /^F_S\d+_T\d+_RV\d+\.md$/;
+      if (!pattern.test(filename)) {
         return res.status(400).json({ error: "Invalid filename format" });
       }