diff --git a/pkgs/servers/x11/xorg/default.nix b/pkgs/servers/x11/xorg/default.nix
index ef5b58787f33..77d68e1d9aab 100644
--- a/pkgs/servers/x11/xorg/default.nix
+++ b/pkgs/servers/x11/xorg/default.nix
@@ -858,11 +858,11 @@ lib.makeScope newScope (self: with self; {
   # THIS IS A GENERATED FILE.  DO NOT EDIT!
   libX11 = callPackage ({ stdenv, pkg-config, fetchurl, xorgproto, libxcb, xtrans }: stdenv.mkDerivation {
     pname = "libX11";
-    version = "1.7.2";
+    version = "1.8.1";
     builder = ./builder.sh;
     src = fetchurl {
-      url = "mirror://xorg/individual/lib/libX11-1.7.2.tar.bz2";
-      sha256 = "0v7aj8q3rlchdyfwdna7n7vgpyzyir391dlv5rwy9fxagbikbyhw";
+      url = "mirror://xorg/individual/lib/libX11-1.8.1.tar.xz";
+      sha256 = "1xyry8i7zqmlkvpbyyqwi18rrdw6ycczlvfp63rh2570pfhimi0v";
     };
     hardeningDisable = [ "bindnow" "relro" ];
     strictDeps = true;
diff --git a/pkgs/servers/x11/xorg/tarballs.list b/pkgs/servers/x11/xorg/tarballs.list
index dbab8a4774f1..302d56a06636 100644
--- a/pkgs/servers/x11/xorg/tarballs.list
+++ b/pkgs/servers/x11/xorg/tarballs.list
@@ -174,7 +174,7 @@ mirror://xorg/individual/lib/libICE-1.0.10.tar.bz2
 mirror://xorg/individual/lib/libpciaccess-0.16.tar.bz2
 mirror://xorg/individual/lib/libSM-1.2.3.tar.bz2
 mirror://xorg/individual/lib/libWindowsWM-1.0.1.tar.bz2
-mirror://xorg/individual/lib/libX11-1.7.2.tar.bz2
+mirror://xorg/individual/lib/libX11-1.8.1.tar.xz
 mirror://xorg/individual/lib/libXau-1.0.9.tar.bz2
 mirror://xorg/individual/lib/libXaw-1.0.14.tar.bz2
 mirror://xorg/individual/lib/libXaw3d-1.6.3.tar.bz2