diff --git a/fix_nodriver.py b/fix_nodriver.py
index aabb64e..1e7c0bb 100644
--- a/fix_nodriver.py
+++ b/fix_nodriver.py
@@ -10,7 +10,9 @@ env_path = os.getenv("VIRTUAL_ENV")
 if env_path is None:
     env_path = Path(os.__file__).parent.parent.parent.as_posix()
 nodriver_path = Path(env_path + "/lib/python3.11/site-packages/nodriver/cdp/network.py")
-
+if not nodriver_path.exists():
+    msg = f"{nodriver_path} not found"
+    raise FileNotFoundError(msg)
 
 new_cookie_partition_key = """\
         if isinstance(json, str):