diff --git a/pkgs/tools/networking/isync/unstable.nix b/pkgs/tools/networking/isync/unstable.nix
index eae7167f2fe..a20fa2fe737 100644
--- a/pkgs/tools/networking/isync/unstable.nix
+++ b/pkgs/tools/networking/isync/unstable.nix
@@ -1,17 +1,17 @@
-{ fetchgit, stdenv, openssl, pkgconfig, db, cyrus_sasl
+{ fetchgit, stdenv, openssl, pkgconfig, db, cyrus_sasl, zlib
 , autoconf, automake }:
 
 stdenv.mkDerivation rec {
-  name = "isync-git-2015-11-08";
-  rev = "46e792";
+  name = "isync-git-20161218";
+  rev = "77acc268123b8233843ca9bc3dcf90669efde08f";
 
   src = fetchgit {
-    url = "git://git.code.sf.net/p/isync/isync";
+    url = "https://git.code.sf.net/p/isync/isync";
     inherit rev;
-    sha256 = "02bm5m3bwpfns7qdwfybyl4fwa146n55v67pdchkhxaqpa4ddws1";
+    sha256 = "0i21cgmgm8acvd7xwdk9pll3kl6cxj9s1hakqzbwks8j4ncygwkj";
   };
 
-  buildInputs = [ openssl pkgconfig db cyrus_sasl autoconf automake ];
+  buildInputs = [ openssl pkgconfig db cyrus_sasl zlib autoconf automake ];
 
   preConfigure = ''
     touch ChangeLog
@@ -22,8 +22,7 @@ stdenv.mkDerivation rec {
     homepage = http://isync.sourceforge.net/;
     description = "Free IMAP and MailDir mailbox synchronizer";
     license = licenses.gpl2Plus;
-
-    maintainers = with maintainers; [ the-kenny ];
+    maintainers = with maintainers; [ the-kenny ttuegel ];
     platforms = platforms.unix;
   };
 }