diff --git a/pkgs/by-name/by/byacc/package.nix b/pkgs/by-name/by/byacc/package.nix
index 5122b08f67cb..9cca09bcd502 100644
--- a/pkgs/by-name/by/byacc/package.nix
+++ b/pkgs/by-name/by/byacc/package.nix
@@ -6,14 +6,14 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "byacc";
-  version = "20240109";
+  version = "20241231";
 
   src = fetchurl {
     urls = [
       "https://invisible-mirror.net/archives/byacc/byacc-${finalAttrs.version}.tgz"
       "ftp://ftp.invisible-island.net/byacc/byacc-${finalAttrs.version}.tgz"
     ];
-    hash = "sha256-8ol3eQFxifGpR1dwXvb24V3JII7wee6n8oq+xXfghEY=";
+    hash = "sha256-GSwvrgSNTn9RS6RRYn+cTmEnZQmfgZwZGR+f3j5glnM=";
   };
 
   configureFlags = [