diff --git a/pkgs/development/compilers/swi-prolog/default.nix b/pkgs/development/compilers/swi-prolog/default.nix
index e8db962d9c4f..a2dae290f447 100644
--- a/pkgs/development/compilers/swi-prolog/default.nix
+++ b/pkgs/development/compilers/swi-prolog/default.nix
@@ -3,14 +3,14 @@
    fontconfig }:
 
 let
-  version = "6.2.6";
+  version = "6.4.1";
 in
 stdenv.mkDerivation {
   name = "swi-prolog-${version}";
 
   src = fetchurl {
     url = "http://www.swi-prolog.org/download/stable/src/pl-${version}.tar.gz";
-    sha256 = "0ii14ghmky91kkh017khahl00s4igkz03b5gy6y0vhv179sz04ll";
+    sha256 = "1szqqwypqfd0qr3sk0qlip1ar22kpqgba6b44klmr1aag0lrahs8";
   };
 
   buildInputs = [gmp readline openssl libjpeg unixODBC libXinerama