diff --git a/pkgs/applications/science/math/nauty/default.nix b/pkgs/applications/science/math/nauty/default.nix
index d7b4707420b..9639376fbda 100644
--- a/pkgs/applications/science/math/nauty/default.nix
+++ b/pkgs/applications/science/math/nauty/default.nix
@@ -1,10 +1,10 @@
 {stdenv, fetchurl}:
 stdenv.mkDerivation rec {
   name = "nauty-${version}";
-  version = "26r10";
+  version = "26r11";
   src = fetchurl {
     url = "http://pallini.di.uniroma1.it/nauty${version}.tar.gz";
-    sha256 = "16pdklh066z6mx424wkisr88fz9divn2caj7ggs03wy3y848spq6";
+    sha256 = "05z6mk7c31j70md83396cdjmvzzip1hqb88pfszzc6k4gy8h3m2y";
   };
   buildInputs = [];
   installPhase = ''