diff --git a/pkgs/development/interpreters/mujs/default.nix b/pkgs/development/interpreters/mujs/default.nix
index 9b9c21f86b6f..a7b53bb8d465 100644
--- a/pkgs/development/interpreters/mujs/default.nix
+++ b/pkgs/development/interpreters/mujs/default.nix
@@ -8,11 +8,11 @@
 
 stdenv.mkDerivation rec {
   pname = "mujs";
-  version = "1.3.3";
+  version = "1.3.4";
 
   src = fetchurl {
     url = "https://mujs.com/downloads/mujs-${version}.tar.gz";
-    hash = "sha256-4sXuVBbf2iIwx6DLeJXfmpstWyBluxjn5k3sKnlqvhs=";
+    hash = "sha256-wBVHWID2o4LnBhaclDcafdbMIgeIMvbghlr4KJwu9Cs=";
   };
 
   buildInputs = [ readline ];