diff --git a/pkgs/development/libraries/tachyon/default.nix b/pkgs/development/libraries/tachyon/default.nix
index e2f611ed9d11..970b8a846222 100644
--- a/pkgs/development/libraries/tachyon/default.nix
+++ b/pkgs/development/libraries/tachyon/default.nix
@@ -13,10 +13,10 @@ assert stdenv.isDarwin -> Carbon != null;
 
 stdenv.mkDerivation rec {
   pname = "tachyon";
-  version = "0.99.3";
+  version = "0.99.4";
   src = fetchurl {
     url = "http://jedi.ks.uiuc.edu/~johns/tachyon/files/${version}/${pname}-${version}.tar.gz";
-    sha256 = "sha256-rsxxm1NK2IPRl/5O2Ng2sC1VH84Zj1uJ6mN+HZHyN+E=";
+    sha256 = "sha256-vJvDHhLDp5rpH9KhXUtQaqfjyai0e3NMKOEkbhYuaA0=";
   };
   buildInputs = lib.optionals stdenv.isDarwin [
     Carbon