diff --git a/pkgs/tools/networking/imapsync/default.nix b/pkgs/tools/networking/imapsync/default.nix
index 877f71bc37b..d6ac630b122 100644
--- a/pkgs/tools/networking/imapsync/default.nix
+++ b/pkgs/tools/networking/imapsync/default.nix
@@ -1,10 +1,10 @@
 {stdenv, makeWrapper, fetchurl, perl, openssl, perlPackages }:
 
 stdenv.mkDerivation rec {
-  name = "imapsync-1.644";
+  name = "imapsync-1.684";
   src = fetchurl {
     url = "https://fedorahosted.org/released/imapsync/${name}.tgz";
-    sha256 = "1lni950qyp841277dnzb43pxpzqyfcl6sachd8j6a0j08826gfky";
+    sha256 = "1ilqdaabh6xiwpjfdg2mrhygvjlxj6jdkmqjqadq5z29172hji5b";
   };
 
   patchPhase = ''