diff --git a/pkgs/applications/networking/browsers/firefox/3.6.nix b/pkgs/applications/networking/browsers/firefox/3.6.nix
index 5a25e80a169..f4e5d3ec53e 100644
--- a/pkgs/applications/networking/browsers/firefox/3.6.nix
+++ b/pkgs/applications/networking/browsers/firefox/3.6.nix
@@ -12,14 +12,14 @@
 
 rec {
 
-  firefoxVersion = "3.6.12";
+  firefoxVersion = "3.6.13";
   
-  xulVersion = "1.9.2.12"; # this attribute is used by other packages
+  xulVersion = "1.9.2.13"; # 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 = "1cc3885687dd5ad21167d9d45f76eb1458f46bdd";
+    sha1 = "1d1bc70d651bce4006687f5762638563c0494267";
   };