diff --git a/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix b/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix
index b865622efe4..d4dd42ba2f1 100644
--- a/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix
+++ b/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix
@@ -2,14 +2,14 @@
 , notmuch, openssl, pkgconfig, sqlite, xapian, zlib
 }:
 stdenv.mkDerivation rec {
-  version = "2";
+  version = "5";
   name = "muchsync-${version}";
   passthru = {
     inherit version;
   };
   src = fetchurl {
     url = "http://www.muchsync.org/src/${name}.tar.gz";
-    sha256 = "1dqp23a043kkzl0g2f4j3m7r7lg303gz7a0fsj0dm5ag3kpvp5f1";
+    sha256 = "1k2m44pj5i6vfhp9icdqs42chsp208llanc666p3d9nww8ngq2lb";
   };
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ notmuch openssl sqlite xapian zlib ];