diff --git a/pkgs/development/interpreters/racket/default.nix b/pkgs/development/interpreters/racket/default.nix
index 748482b1bf08..03d646a3b4d6 100644
--- a/pkgs/development/interpreters/racket/default.nix
+++ b/pkgs/development/interpreters/racket/default.nix
@@ -37,11 +37,11 @@ in
 
 stdenv.mkDerivation rec {
   name = "racket-${version}";
-  version = "6.3";
+  version = "6.4";
 
   src = fetchurl {
     url = "http://mirror.racket-lang.org/installers/${version}/${name}-src.tgz";
-    sha256 = "0f21vnads6wsrzimfja969gf3pkl60s0rdfrjf9s70lcy9x0jz4i";
+    sha256 = "1qyzq91r1kzk2k0faggqd5idwmsxizkjbdgxn6ik9iwwsjycxbw6";
   };
 
   FONTCONFIG_FILE = fontsConf;