diff --git a/pkgs/development/tools/misc/arcanist/default.nix b/pkgs/development/tools/misc/arcanist/default.nix
index 67c32c0a806..49e5c67572b 100644
--- a/pkgs/development/tools/misc/arcanist/default.nix
+++ b/pkgs/development/tools/misc/arcanist/default.nix
@@ -3,18 +3,18 @@
 let
   libphutil = fetchgit {
     url    = "git://github.com/phacility/libphutil.git";
-    rev    = "e509fc30ae782af97f3535b1febbf50d0f919d5a";
-    sha256 = "087dc5aadf1f78ebc7cf2b9107422f211b98ac96493fab8cf6bd9924ba77d986";
+    rev    = "b25e0477b280ca3e8345bb97cd55e95bcb5023ec";
+    sha256 = "04l1am6k3xcjya3dscjb3vacg0fklbzqiv84qqi98rq3b3mgyhz8";
   };
   arcanist = fetchgit {
     url    = "git://github.com/phacility/arcanist.git";
-    rev    = "fe8ed2a6f8b09b8c56e476ed1f9624d35732b776";
-    sha256 = "602fe03671c424d55af63e6288e906b350183bb42d558498ded005ae7e83fc85";
+    rev    = "2234c8cacc21ce61c9c10e8e5918b6a63cc38fc8";
+    sha256 = "1c0wsgg10v94iy8dwa8pw4qcxafn7nvb9s57x2ps4a08lxakimn0";
   };
 in
 stdenv.mkDerivation rec {
   name    = "arcanist-${version}";
-  version = "20150817";
+  version = "20160516";
 
   src = [ arcanist libphutil ];
   buildInputs = [ php makeWrapper flex ];