diff --git a/main.py b/main.py
index d12a0fa..d6ccb69 100755
--- a/main.py
+++ b/main.py
@@ -44,6 +44,8 @@ while True:
         print("THERE ARE NO CHEAT CODES IN THIS GAME!!!")
     elif "su" in x:
         os.system("xdg-open https://xkcd.com/838/")
+    elif not x.isalnum():
+        print("NO SPECIAL CHARACTERS!!!")
     else:
         r = os.system(x)
         if r == 0: