diff --git a/pkgs/development/libraries/expat/default.nix b/pkgs/development/libraries/expat/default.nix
index a356d7be1a9e..29d2c2b3acb9 100644
--- a/pkgs/development/libraries/expat/default.nix
+++ b/pkgs/development/libraries/expat/default.nix
@@ -1,16 +1,18 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl, lib }:
 
 # Note: this package is used for bootstrapping fetchurl, and thus
 # cannot use fetchpatch! All mutable patches (generated by GitHub or
 # cgit) that are needed here should be included directly in Nixpkgs as
 # files.
 
-stdenv.mkDerivation rec {
-  name = "expat-2.2.8";
+let
+  version = "2.2.10";
+in stdenv.mkDerivation rec {
+  name = "expat-${version}";
 
   src = fetchurl {
-    url = "https://github.com/libexpat/libexpat/releases/download/R_2_2_8/${name}.tar.xz";
-    sha256 = "16vpj5mk3lps3x7fr8cs03rffx3ir4jilyqw0frayn6q94daijk1";
+    url = "https://github.com/libexpat/libexpat/releases/download/R_${lib.replaceStrings ["."] ["_"] version}/${name}.tar.xz";
+    sha256 = "sha256-Xf5Tj4tbY/A+mO2sUg19mmpNIuSC5cltTQb8xUhcJfI=";
   };
 
   outputs = [ "out" "dev" ]; # TODO: fix referrers