diff --git a/xiaosai/Claude_Shannon/dockerfile b/xiaosai/Claude_Shannon/dockerfile
index 2f647a8..3d931c8 100644
--- a/xiaosai/Claude_Shannon/dockerfile
+++ b/xiaosai/Claude_Shannon/dockerfile
@@ -1,4 +1,4 @@
-FROM python:latest
+FROM python:3.11
 
 COPY flag.py /app/
 
diff --git a/xiaosai/Claude_Shannon/main_local.py b/xiaosai/Claude_Shannon/main_local.py
index 6c0dd40..3bdf623 100644
--- a/xiaosai/Claude_Shannon/main_local.py
+++ b/xiaosai/Claude_Shannon/main_local.py
@@ -1,6 +1,5 @@
 from random import choice as c
 from random import randint, shuffle
-from Crypto.Util.number import * # type: ignore
 
 flag = b"flag{this_is_a_test_flag}"
 
diff --git a/xiaosai/Claude_Shannon/main_remote.py b/xiaosai/Claude_Shannon/main_remote.py
index 767e45f..5c6bfe1 100644
--- a/xiaosai/Claude_Shannon/main_remote.py
+++ b/xiaosai/Claude_Shannon/main_remote.py
@@ -33,8 +33,10 @@ class Task(socketserver.BaseRequestHandler):
             C0, C1, C2, C3, C4, C5, C6 = chests
             r = eval(expr)
         except Exception as e:
-            self.send(b"Shannon fails to understand your words.\n")
             self.send(e)
+            self.send(b"Shannon fails to understand your words.\n")
+            print(f"Exception: {e}")  # Debug print
+            print(f"Failed expression: {expr}")  # Debug print
             exit(0)
         return ans(r)