diff --git a/udctf-2023/python-jail/README.md b/udctf-2023/python-jail/README.md
index 6d8713b..e5b95f2 100644
--- a/udctf-2023/python-jail/README.md
+++ b/udctf-2023/python-jail/README.md
@@ -2,6 +2,8 @@
 
 ## problem
 
+see [./Dockerfile](./Dockerfile)
+
 ```py
 #!/usr/bin/env python