diff --git a/pkgs/tools/misc/bibutils/default.nix b/pkgs/tools/misc/bibutils/default.nix
index 90a2211235d..d8690855974 100644
--- a/pkgs/tools/misc/bibutils/default.nix
+++ b/pkgs/tools/misc/bibutils/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "bibutils-${version}";
-  version = "6.3";
+  version = "6.5";
 
   src = fetchurl {
     url = "mirror://sourceforge/bibutils/bibutils_${version}_src.tgz";
-    sha256 = "10r5v5xbhsxdh6vq6g2xp6lgmpjdzba83h4m4clfhrzqis8clwqy";
+    sha256 = "0bc5b9nyxbcc1y4vrhghj9y9221i34qq384zslfyb0ihkb6kq521";
   };
 
   configureFlags = [ "--dynamic" "--install-dir" "$(out)/bin" "--install-lib" "$(out)/lib" ];