diff --git a/pkgs/servers/x11/xorg/default.nix b/pkgs/servers/x11/xorg/default.nix
index b53a5a23533..ccf0dfe9034 100644
--- a/pkgs/servers/x11/xorg/default.nix
+++ b/pkgs/servers/x11/xorg/default.nix
@@ -820,11 +820,11 @@ lib.makeScope newScope (self: with self; {
   }) {};
 
   libX11 = callPackage ({ stdenv, pkgconfig, fetchurl, inputproto, kbproto, libxcb, xextproto, xf86bigfontproto, xproto, xtrans }: stdenv.mkDerivation {
-    name = "libX11-1.6.6";
+    name = "libX11-1.6.7";
     builder = ./builder.sh;
     src = fetchurl {
-      url = mirror://xorg/individual/lib/libX11-1.6.6.tar.bz2;
-      sha256 = "0ks1mxlda7nxfmffihi15ljsn50q8dknl33i2xag8xzc80fiizk5";
+      url = mirror://xorg/individual/lib/libX11-1.6.7.tar.bz2;
+      sha256 = "0j0k5bjz4kd7rx6z09n5ggxbzbi84wf78xx25ikx6jmsxwq9w3li";
     };
     hardeningDisable = [ "bindnow" "relro" ];
     nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/servers/x11/xorg/tarballs-7.7.list b/pkgs/servers/x11/xorg/tarballs-7.7.list
index 1775d697d81..30b553b93db 100644
--- a/pkgs/servers/x11/xorg/tarballs-7.7.list
+++ b/pkgs/servers/x11/xorg/tarballs-7.7.list
@@ -60,7 +60,7 @@ mirror://xorg/individual/lib/libICE-1.0.9.tar.bz2
 mirror://xorg/individual/lib/libpciaccess-0.14.tar.bz2
 mirror://xorg/individual/lib/libSM-1.2.2.tar.bz2
 mirror://xorg/X11R7.7/src/everything/libWindowsWM-1.0.1.tar.bz2
-mirror://xorg/individual/lib/libX11-1.6.6.tar.bz2
+mirror://xorg/individual/lib/libX11-1.6.7.tar.bz2
 mirror://xorg/individual/lib/libXau-1.0.8.tar.bz2
 mirror://xorg/individual/lib/libXaw-1.0.13.tar.bz2
 mirror://xorg/individual/lib/libXcomposite-0.4.4.tar.bz2