diff --git a/bootstrap.js b/bootstrap.js
index fe3473b..6d2df62 100644
--- a/bootstrap.js
+++ b/bootstrap.js
@@ -1,4 +1,4 @@
-const Cu = Components.utils;
+const Cu = ChromeUtils;
 const Cc = Components.classes;
 const Ci = Components.interfaces;
 
diff --git a/content/overlay.js b/content/overlay.js
index d035596..aa38add 100644
--- a/content/overlay.js
+++ b/content/overlay.js
@@ -2,7 +2,7 @@
 
 var EXPORTED_SYMBOLS = ["TKPManager"];
 
-const Cu = Components.utils;
+const Cu = ChromeUtils;
 const Ci = Components.interfaces;
 const Cc = Components.classes;
 
diff --git a/content/ui.jsm b/content/ui.jsm
index aa5d6b5..166a82e 100644
--- a/content/ui.jsm
+++ b/content/ui.jsm
@@ -2,7 +2,7 @@
 
 var EXPORTED_SYMBOLS = ["Ui"];
 
-const Cu = Components.utils;
+const Cu = ChromeUtils;
 const Ci = Components.interfaces;
 const Cc = Components.classes;