diff --git a/libxfce4ui.spec b/libxfce4ui.spec
index 6741a9e..cc6394d 100644
--- a/libxfce4ui.spec
+++ b/libxfce4ui.spec
@@ -1,7 +1,7 @@
 %define majver %(echo %version | cut -d. -f1-2)
 Name:          libxfce4ui
 Version:       4.16.1
-Release:       1mamba
+Release:       2mamba
 Summary:       Xfce's unified widgets library
 Group:         System/Libraries
 Vendor:        openmamba
@@ -32,9 +32,10 @@ BuildRequires: libxfconf-devel
 BuildRequires: libxml2-devel
 ## AUTOBUILDREQ-END
 Provides:      libxfce4mcs
-Obsoletes:     libxfce4mcs
+Obsoletes:     libxfce4mcs < 4.16.1
 Provides:      libxfcegui4
-Obsoletes:     libxfcequi4
+Obsoletes:     libxfcequi4 < 4.16.1
+BuildRequires: glade-devel >= 3.38.2
 
 %description
 Xfce's unified widgets library.
@@ -44,14 +45,13 @@ Group:         Development/Libraries
 Summary:       Static libraries and headers for %{name}
 Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 Provides:      libxfce4mcs-devel
-Obsoletes:     libxfce4mcs-devel
+Obsoletes:     libxfce4mcs-devel < 4.16.1
 Provides:      libxfcegui4-devel
-Obsoletes:     libxfcequi4-devel
+Obsoletes:     libxfcequi4-devel < 4.16.1
 
 %description devel
 Xfce's unified widgets library.
-
-This package contains static libraries and header files need for development.
+This package contains static libraries and header files needed for development.
 
 %package apidocs
 Group:         Documentation
@@ -123,6 +123,9 @@ This package includes the %{name} API documentation.
 %{_datadir}/gtk-doc/html/%{name}
 
 %changelog
+* Mon Apr 25 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 4.16.1-2mamba
+- rebuilt with glade 3.38.2
+
 * Mon Sep 06 2021 Automatic Build System <autodist@mambasoft.it> 4.16.1-1mamba
 - automatic version update by autodist