diff --git a/pkgs/development/libraries/tachyon/default.nix b/pkgs/development/libraries/tachyon/default.nix
index ed2819e88c1..64746d84572 100644
--- a/pkgs/development/libraries/tachyon/default.nix
+++ b/pkgs/development/libraries/tachyon/default.nix
@@ -9,10 +9,10 @@
 
 stdenv.mkDerivation rec {
   pname = "tachyon";
-  version = "0.99.4";
+  version = "0.99.5";
   src = fetchurl {
     url = "http://jedi.ks.uiuc.edu/~johns/tachyon/files/${version}/${pname}-${version}.tar.gz";
-    sha256 = "sha256-vJvDHhLDp5rpH9KhXUtQaqfjyai0e3NMKOEkbhYuaA0=";
+    sha256 = "sha256-CSA8ECMRFJ9d9cw2dAn5bHJXQmZtGcJNtbqZTVqBpvU=";
   };
   buildInputs = lib.optionals stdenv.isDarwin [
     Carbon