diff --git a/pkgs/applications/misc/synapse/default.nix b/pkgs/applications/misc/synapse/default.nix
index a337b5eae996..0da0b83d64ab 100644
--- a/pkgs/applications/misc/synapse/default.nix
+++ b/pkgs/applications/misc/synapse/default.nix
@@ -3,13 +3,13 @@
 }:
 
 let
-  version = "0.2.99.3";
+  version = "0.2.99.4";
 in stdenv.mkDerivation rec {
   name = "synapse-${version}";
 
   src = fetchurl {
     url = "https://launchpad.net/synapse-project/0.3/${version}/+download/${name}.tar.xz";
-    sha256 = "0rwd42164xqfi40r13yr29cx6zy3bckgxk00y53b376nl5yqacvy";
+    sha256 = "1g6x9knb4jy1d8zgssjhzkgac583137pibisy9whjs8mckaj4k1j";
   };
 
   nativeBuildInputs = [