diff --git a/lib/common/Key.js b/lib/common/Key.js
index e3a288b..0665c49 100644
--- a/lib/common/Key.js
+++ b/lib/common/Key.js
@@ -1,4 +1,6 @@
 var bignum = require('bignum');
+var Point = require('./Point');
+var SecureRandom = require('./SecureRandom');
 var Key = function() {}
 
 Key.parseDERsig = function(sig) {