diff --git a/pkgs/development/libraries/muparserx/default.nix b/pkgs/development/libraries/muparserx/default.nix
index bdc558dc1029..c6b6c75c22d8 100644
--- a/pkgs/development/libraries/muparserx/default.nix
+++ b/pkgs/development/libraries/muparserx/default.nix
@@ -5,13 +5,13 @@
 
 stdenv.mkDerivation rec {
   pname = "muparserx";
-  version = "4.0.11";
+  version = "4.0.12";
 
   src = fetchFromGitHub {
     owner = "beltoforion";
     repo = "muparserx";
     rev = "v${version}";
-    sha256 = "sha256-BWzHlz1mQYsvWa53EtO05Rb4rRHJBSRguJTHLtgqpPw=";
+    sha256 = "sha256-rekPXmncNdVX6LvPQP1M2Pzs3pyiCCcLPLnPFiyWJ4s=";
   };
 
   nativeBuildInputs = [ cmake ];