diff --git a/app/luclient.py b/app/luclient.py
index 482d8ac..aa108ae 100644
--- a/app/luclient.py
+++ b/app/luclient.py
@@ -145,7 +145,7 @@ def brick_list():
                 brick_list.append(
                     {
                         "type": "file",
-                        "name": str(path.as_posix()).replace("{current_app.config['CACHE_LOCATION']}", "")
+                        "name": str(path.as_posix()).replace(f"{current_app.config['CACHE_LOCATION']}", "")
                     }
                 )
     response = make_response(json.dumps(brick_list))