diff --git a/xfce4-panel.spec b/xfce4-panel.spec
index a440cfd..63d3ce0 100644
--- a/xfce4-panel.spec
+++ b/xfce4-panel.spec
@@ -1,6 +1,6 @@
 %define majver %(echo %version | cut -d. -f1-2)
 Name:          xfce4-panel
-Version:       4.16.2
+Version:       4.16.3
 Release:       1mamba
 Summary:       Panel for Xfce 4
 Group:         Graphical Desktop/Applications/Utilities
@@ -13,43 +13,37 @@ License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: exo-devel
 BuildRequires: glibc-devel
+BuildRequires: libICE-devel
+BuildRequires: libSM-devel
+BuildRequires: libX11-devel
+BuildRequires: libXau-devel
+BuildRequires: libXdmcp-devel
+BuildRequires: libXext-devel
 BuildRequires: libatk-devel
+BuildRequires: libbrotli-devel
+BuildRequires: libbsd-devel
 BuildRequires: libbzip2-devel
 BuildRequires: libcairo-devel
-BuildRequires: libdbus-devel
-BuildRequires: libdbus-glib-devel
-BuildRequires: libexpat-devel
-BuildRequires: libffi-devel
-BuildRequires: libfontconfig-devel
+BuildRequires: libdbusmenu-devel
+BuildRequires: libdbusmenu-gtk3-devel
 BuildRequires: libfreetype-devel
 BuildRequires: libgarcon-devel
 BuildRequires: libgdk-pixbuf-devel
 BuildRequires: libglib-devel
 BuildRequires: libgraphite2-devel
-BuildRequires: libgtk2-devel
+BuildRequires: libgtk3-devel
 BuildRequires: libharfbuzz-devel
-BuildRequires: libICE-devel
-BuildRequires: libicu-devel
 BuildRequires: libpango-devel
-BuildRequires: libpng15-devel
+BuildRequires: libpcre-devel
 BuildRequires: libpng-devel
-BuildRequires: libpthread-stubs-devel
-BuildRequires: libselinux-devel
-BuildRequires: libSM-devel
 BuildRequires: libstartup-notification-devel
-BuildRequires: libstdc++6-devel
 BuildRequires: libuuid-devel
-BuildRequires: libwnck2-devel
-BuildRequires: libX11-devel
-BuildRequires: libXau-devel
+BuildRequires: libwnck-devel
 BuildRequires: libxcb-devel
-BuildRequires: libXdmcp-devel
-BuildRequires: libXext-devel
 BuildRequires: libxfce4ui-devel
 BuildRequires: libxfce4util-devel
-BuildRequires: libXres-devel
+BuildRequires: libxfconf-devel
 BuildRequires: libz-devel
-BuildRequires: xfconf-devel
 ## AUTOBUILDREQ-END
 BuildRequires: libxfce4util-devel >= 4.4.0
 BuildRequires: libxfcegui4-devel >= 4.4.0
@@ -144,6 +138,9 @@ fi
 %doc README.md ChangeLog NEWS INSTALL
 
 %changelog
+* Mon May 10 2021 Automatic Build System <autodist@mambasoft.it> 4.16.3-1mamba
+- automatic version update by autodist
+
 * Fri Feb 26 2021 Automatic Build System <autodist@mambasoft.it> 4.16.2-1mamba
 - automatic version update by autodist