diff --git a/lib/cassy/utils.rb b/lib/cassy/utils.rb
index d5dba91..f7b8f6a 100644
--- a/lib/cassy/utils.rb
+++ b/lib/cassy/utils.rb
@@ -1,5 +1,3 @@
-require 'crypt/isaac'
-
 # Misc utility function used throughout by the RubyCAS-Server.
 module Cassy
   module Utils