diff --git a/pkgs/development/libraries/muparser/default.nix b/pkgs/development/libraries/muparser/default.nix
index 9d9a524e86d0..b68f04f642fb 100644
--- a/pkgs/development/libraries/muparser/default.nix
+++ b/pkgs/development/libraries/muparser/default.nix
@@ -1,11 +1,14 @@
 {stdenv, fetchurl, unzip}:
 
-stdenv.mkDerivation {
-	name = "muparser-2.2.2";
-	src = fetchurl {
-		url = mirror://sourceforge/muparser/muparser_v2_2_2.zip;
-		sha256 = "0pncvjzzbwcadgpwnq5r7sl9v5r2y9gjgfnlw0mrs9wj206dbhx9";
-	};
+stdenv.mkDerivation rec {
+  name = "muparser-${version}";
+  version = "2.2.3";
+  url-version = stdenv.lib.replaceChars ["."] ["_"] version;
+
+  src = fetchurl {
+    url = "mirror://sourceforge/muparser/muparser_v${url-version}.zip";
+    sha256 = "00l92k231yb49wijzkspa2l58mapn6vh2dlxnlg0pawjjfv33s6z";
+  };
 
   buildInputs = [ unzip ];