diff --git a/caesar.py b/caesar.py
index 016daf6..1013148 100644
--- a/caesar.py
+++ b/caesar.py
@@ -28,7 +28,7 @@ for char in txt_list: # loop through all of the chars
     index = index + in_key # shift the alphabet
     while( index > alen - 1 ): #cycle through the alphabet
         print("Alphabet cycle")
-        index = (index + in_key) - (alen - 1)
+        index = index - (alen - 1)
 
     decryp_list[charindex] = alphabet[in_alphabet][index]