diff --git a/pkgs/servers/mail/dovecot/2.2.x.nix b/pkgs/servers/mail/dovecot/2.2.x.nix
index 2d38f3f5cef3..ac0df550080b 100644
--- a/pkgs/servers/mail/dovecot/2.2.x.nix
+++ b/pkgs/servers/mail/dovecot/2.2.x.nix
@@ -2,14 +2,14 @@
 , inotify-tools, clucene_core_2, sqlite }:
 
 stdenv.mkDerivation rec {
-  name = "dovecot-2.2.19";
+  name = "dovecot-2.2.21";
 
   buildInputs = [ perl openssl bzip2 zlib openldap clucene_core_2 sqlite ]
     ++ stdenv.lib.optionals (stdenv.isLinux) [ systemd pam inotify-tools ];
 
   src = fetchurl {
     url = "http://dovecot.org/releases/2.2/${name}.tar.gz";
-    sha256 = "17sf5aancad4pg1vx1606k99389wg76blpqzmnmxlz4hklzix7km";
+    sha256 = "080bil83gr2dski4gk2bxykg2g497kqm2hn2z4xkbw71b6g17dvs";
   };
 
   preConfigure = ''