diff --git a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
index 6cdb2ee06f2..d86eee5a9c0 100644
--- a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
+++ b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
@@ -3,11 +3,11 @@ let
   dovecotMajorMinor = lib.versions.majorMinor dovecot.version;
 in stdenv.mkDerivation rec {
   pname = "dovecot-pigeonhole";
-  version = "0.5.14";
+  version = "0.5.15";
 
   src = fetchurl {
     url = "https://pigeonhole.dovecot.org/releases/${dovecotMajorMinor}/dovecot-${dovecotMajorMinor}-pigeonhole-${version}.tar.gz";
-    sha256 = "1lmjzz4kd90wbdslacybizd1dks4bhwmrx39lj8b19naldw0zjk8";
+    sha256 = "1l2h0p8ddsl3ja2lnwk0mfqplqh8n0iw8k27awd3ak7prr88yjg1";
   };
 
   buildInputs = [ dovecot openssl ];