diff --git a/services/sheesh/dist/chall.py b/services/sheesh/dist/chall.py
index 0234a3a..e7e30b7 100644
--- a/services/sheesh/dist/chall.py
+++ b/services/sheesh/dist/chall.py
@@ -3,12 +3,11 @@
 import os
 import binascii
 import hashlib
-import threading
-import time
-import sys
+import signal
 from Crypto.Cipher import AES
 from Crypto.Util.Padding import pad, unpad
 
+signal.alarm(50)
 seed_bits = 23
 seed_max  = 1 << seed_bits
 seed_len  = (seed_bits + 7) // 8
@@ -58,12 +57,6 @@ third = 0
 iv11 = None
 iv22 = None
 
-def alarm():
-    time.sleep(180)
-    print("zzz")
-    sys.exit(0)
-
-threading.Thread(target=alarm, daemon=True).start()
 
 while True:
     menu()
diff --git a/services/sheesh/src/chall.py b/services/sheesh/src/chall.py
index 65185b7..2ad1df3 100644
--- a/services/sheesh/src/chall.py
+++ b/services/sheesh/src/chall.py
@@ -3,12 +3,11 @@
 import os
 import binascii
 import hashlib
-import threading
-import time
-import sys
+import signal
 from Crypto.Cipher import AES
 from Crypto.Util.Padding import pad, unpad
 
+signal.alarm(50)
 seed_bits = 23
 seed_max  = 1 << seed_bits
 seed_len  = (seed_bits + 7) // 8
@@ -58,12 +57,6 @@ third = 0
 iv11 = None
 iv22 = None
 
-def alarm():
-    time.sleep(180)
-    print("zzz")
-    sys.exit(0)
-
-threading.Thread(target=alarm, daemon=True).start()
 
 while True:
     menu()