diff --git a/dovecot-pigeonhole.spec b/dovecot-pigeonhole.spec
index df70d10..bdaef71 100644
--- a/dovecot-pigeonhole.spec
+++ b/dovecot-pigeonhole.spec
@@ -1,7 +1,8 @@
-%define dovecot_ver %(echo %version | cut -d. -f1-2)
+%define dovecot_majver %(echo %version | cut -d. -f1-2)
+%define dovecot_ver %(echo %version | cut -d. -f1-2,5)
 %define pigeonhole_ver %(echo %version | cut -d. -f3-5)
 Name:          dovecot-pigeonhole
-Version:       2.3.0.5.14
+Version:       2.3.0.5.16
 Release:       1mamba
 Summary:       Provides Sieve support as a plugin to Dovecot's Local Delivery Agent (LDA)
 Group:         System/Servers
@@ -9,23 +10,22 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://pigeonhole.dovecot.org/
-Source:        https://pigeonhole.dovecot.org/releases/%{dovecot_ver}/dovecot-%{dovecot_ver}-pigeonhole-%{pigeonhole_ver}.tar.gz
+Source:        https://pigeonhole.dovecot.org/releases/%{dovecot_ver}/dovecot-%{dovecot_majver}-pigeonhole-%{pigeonhole_ver}.tar.gz
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: dovecot-devel
 BuildRequires: glibc-devel
+BuildRequires: libdovecot-devel
 BuildRequires: libopenssl-devel
 ## AUTOBUILDREQ-END
-Requires:      dovecot >= %{dovecot_ver}
-Requires:      dovecot <= %{dovecot_ver}.255
-
-%debug_package
+Requires:      dovecot = %{dovecot_ver}
 
 %description
 The Pigeonhole project provides Sieve support as a plugin to Dovecot's Local Delivery Agent (LDA). The ManageSieve protocol is provided is an additional service, next to Dovecot's own POP3 and IMAP services.
 
+%debug_package
+
 %prep
-%setup -q -n dovecot-%{dovecot_ver}-pigeonhole-%{pigeonhole_ver}
+%setup -q -n dovecot-%{dovecot_majver}-pigeonhole-%{pigeonhole_ver}
 
 %build
 %configure \
@@ -108,6 +108,9 @@ cp -a %{buildroot}%{_docdir}/dovecot/example-config/* %{buildroot}%{_sysconfdir}
 %doc AUTHORS COPYING
 
 %changelog
+* Sat Sep 25 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.0.5.16-1mamba
+- update to 2.3.0.5.16
+
 * Tue Mar 23 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.0.5.14-1mamba
 - update to 2.3.0.5.14