diff --git a/pkgs/applications/networking/browsers/firefox/3.5.nix b/pkgs/applications/networking/browsers/firefox/3.5.nix
index 1ed4339124c1..b98840c8f480 100644
--- a/pkgs/applications/networking/browsers/firefox/3.5.nix
+++ b/pkgs/applications/networking/browsers/firefox/3.5.nix
@@ -12,14 +12,14 @@
 
 rec {
 
-  firefoxVersion = "3.5.5";
+  firefoxVersion = "3.5.6";
   
-  xulVersion = "1.9.1.5"; # this attribute is used by other packages
+  xulVersion = "1.9.1.6"; # this attribute is used by other packages
 
   
   src = fetchurl {
     url = "http://releases.mozilla.org/pub/mozilla.org/firefox/releases/${firefoxVersion}/source/firefox-${firefoxVersion}.source.tar.bz2";
-    sha1 = "a2146fb6dc8e879a78fa13849f187c14d41442ca";
+    sha1 = "fc1de4ddb9c20c7ba9e297737f926e9d8e32eed4";
   };