diff --git a/pkgs/by-name/na/nauty/package.nix b/pkgs/by-name/na/nauty/package.nix
index 769c2e121081..123b10fe3a02 100644
--- a/pkgs/by-name/na/nauty/package.nix
+++ b/pkgs/by-name/na/nauty/package.nix
@@ -5,13 +5,13 @@
 }:
 stdenv.mkDerivation rec {
   pname = "nauty";
-  version = "2.9.0";
+  version = "2.9.1";
 
   src = fetchurl {
     url = "https://pallini.di.uniroma1.it/nauty${
       builtins.replaceStrings [ "." ] [ "_" ] version
     }.tar.gz";
-    sha256 = "sha256-eziDTHzv4X0l4F7vHvOIL6nNGTP1grnrnedHdBGVYFM=";
+    sha256 = "sha256-SI+pBtEKNyxy0jZMXe5I4PcwcAT75SwrzlDFLejNhz4=";
   };
 
   outputs = [
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     "dev"
   ];
 
-  # HACK: starting from 2.9.0, the makefile tries to copy .libs/*.a files unconditionally
+  # HACK: starting from 2.8.9, the makefile tries to copy .libs/*.a files unconditionally
   dontDisableStatic = true;
 
   configureFlags = [
@@ -50,10 +50,8 @@ stdenv.mkDerivation rec {
     license = licenses.asl20;
     teams = [ teams.sage ];
     platforms = platforms.unix;
-    # I'm not sure if the filename will remain the same for future changelog or
-    # if it will track changes to minor releases. Lets see. Better than nothing
-    # in any case.
-    changelog = "https://pallini.di.uniroma1.it/changes24-28.txt";
+    # The filename may change for future changelogs. Better than nothing in any case.
+    changelog = "https://pallini.di.uniroma1.it/changes24-2${lib.versions.minor version}.txt";
     homepage = "https://pallini.di.uniroma1.it/";
   };
 }