diff --git a/dovecot-pigeonhole.spec b/dovecot-pigeonhole.spec
index 92d5b6f..7b8535b 100644
--- a/dovecot-pigeonhole.spec
+++ b/dovecot-pigeonhole.spec
@@ -2,7 +2,7 @@
 %define dovecot_ver %(echo %version | cut -d. -f1-2,5)
 %define pigeonhole_ver %(echo %version | cut -d. -f3-5)
 Name:          dovecot-pigeonhole
-Version:       2.3.0.5.19
+Version:       2.3.0.5.20
 Release:       1mamba
 Summary:       Provides Sieve support as a plugin to Dovecot's Local Delivery Agent (LDA)
 Group:         System/Servers
@@ -17,6 +17,7 @@ BuildRequires: glibc-devel
 BuildRequires: libdovecot-devel
 BuildRequires: libopenssl-devel
 ## AUTOBUILDREQ-END
+BuildRequires: dovecot-devel >= 0:2.3.20-2mamba
 BuildRequires: libdovecot-devel = %{dovecot_ver}
 Requires:      dovecot = %{dovecot_ver}
 
@@ -57,35 +58,25 @@ cp -a %{buildroot}%{_docdir}/dovecot/example-config/* %{buildroot}%{_sysconfdir}
 %dir %{_includedir}/dovecot/sieve
 %{_includedir}/dovecot/sieve/*.h
 %{_libdir}/dovecot/lib90_sieve_plugin.a
-%{_libdir}/dovecot/lib90_sieve_plugin.la
 %{_libdir}/dovecot/lib90_sieve_plugin.so
 %{_libdir}/dovecot/lib95_imap_filter_sieve_plugin.a
-%{_libdir}/dovecot/lib95_imap_filter_sieve_plugin.la
 %{_libdir}/dovecot/lib95_imap_filter_sieve_plugin.so
 %{_libdir}/dovecot/lib95_imap_sieve_plugin.a
-%{_libdir}/dovecot/lib95_imap_sieve_plugin.la
 %{_libdir}/dovecot/lib95_imap_sieve_plugin.so
 %{_libdir}/dovecot/libdovecot-sieve.a
-%{_libdir}/dovecot/libdovecot-sieve.la
 %{_libdir}/dovecot/libdovecot-sieve.so
 %{_libdir}/dovecot/libdovecot-sieve.so.*
 %{_libdir}/dovecot/doveadm/lib10_doveadm_sieve_plugin.a
-%{_libdir}/dovecot/doveadm/lib10_doveadm_sieve_plugin.la
 %{_libdir}/dovecot/doveadm/lib10_doveadm_sieve_plugin.so
 %{_libdir}/dovecot/settings/libmanagesieve_login_settings.a
-%{_libdir}/dovecot/settings/libmanagesieve_login_settings.la
 %{_libdir}/dovecot/settings/libmanagesieve_login_settings.so
 %{_libdir}/dovecot/settings/libmanagesieve_settings.a
-%{_libdir}/dovecot/settings/libmanagesieve_settings.la
 %{_libdir}/dovecot/settings/libmanagesieve_settings.so
 %{_libdir}/dovecot/settings/libpigeonhole_settings.a
-%{_libdir}/dovecot/settings/libpigeonhole_settings.la
 %{_libdir}/dovecot/settings/libpigeonhole_settings.so
 %{_libdir}/dovecot/sieve/lib90_sieve_extprograms_plugin.a
-%{_libdir}/dovecot/sieve/lib90_sieve_extprograms_plugin.la
 %{_libdir}/dovecot/sieve/lib90_sieve_extprograms_plugin.so
 %{_libdir}/dovecot/sieve/lib90_sieve_imapsieve_plugin.a
-%{_libdir}/dovecot/sieve/lib90_sieve_imapsieve_plugin.la
 %{_libdir}/dovecot/sieve/lib90_sieve_imapsieve_plugin.so
 %{_libexecdir}/dovecot/managesieve
 %{_libexecdir}/dovecot/managesieve-login
@@ -109,6 +100,9 @@ cp -a %{buildroot}%{_docdir}/dovecot/example-config/* %{buildroot}%{_sysconfdir}
 %doc AUTHORS COPYING
 
 %changelog
+* Thu Mar 02 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.0.5.20-1mamba
+- update to 2.3.0.5.20
+
 * Wed May 25 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.0.5.19-1mamba
 - update to 2.3.0.5.19