diff --git a/pkgs/tools/networking/mu/default.nix b/pkgs/tools/networking/mu/default.nix
index aa1e004d1afc..c103637c6858 100644
--- a/pkgs/tools/networking/mu/default.nix
+++ b/pkgs/tools/networking/mu/default.nix
@@ -5,13 +5,13 @@
 
 stdenv.mkDerivation rec {
   pname = "mu";
-  version = "1.4.1";
+  version = "1.4.3";
 
   src = fetchFromGitHub {
     owner  = "djcb";
     repo   = "mu";
     rev    = version;
-    sha256 = "0q2ik7fj5k9i76js4ijyxbgrwqff437lass0sd5if2r40rqh0as0";
+    sha256 = "1i9chd8ks1q4g5pyscsir6pw4kahkx3k8ckzbi8j3gr6jz1qzzsg";
   };
 
   buildInputs = [