diff --git a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
index 1b744181096c..a0b03193729a 100644
--- a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
+++ b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "dovecot-pigeonhole-${version}";
-  version = "0.5.2";
+  version = "0.5.3";
 
   src = fetchurl {
     url = "https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-${version}.tar.gz";
-    sha256 = "0d95q2yj2f750jwg599jlizlglldcz9hs52y4mhrflwfqlaqw3lm";
+    sha256 = "08i6vw6k2v906s4sc6wl9ffpz6blzdga6vglqpqjm7jzq10jfbz0";
   };
 
   buildInputs = [ dovecot openssl ];