diff --git a/pkgs/tools/misc/mbuffer/default.nix b/pkgs/tools/misc/mbuffer/default.nix
index ec4157fb37cad..548fdefc098b6 100644
--- a/pkgs/tools/misc/mbuffer/default.nix
+++ b/pkgs/tools/misc/mbuffer/default.nix
@@ -7,11 +7,11 @@
 
 stdenv.mkDerivation rec {
   pname = "mbuffer";
-  version = "20230301";
+  version = "20231216";
 
   src = fetchurl {
     url = "http://www.maier-komor.de/software/mbuffer/mbuffer-${version}.tgz";
-    sha256 = "sha256-U/diCd7AD6soPcC8UyKw5jRrCdou27ZDWi1Kj0glLQE=";
+    sha256 = "sha256-Sif2YhoG5/PdGohGR51rIuMhJgPzv4JaDoyTlAv3aJw=";
   };
 
   buildInputs = [