diff --git a/xorgproto.spec b/xorgproto.spec
index 6d10c5e..45610cf 100644
--- a/xorgproto.spec
+++ b/xorgproto.spec
@@ -1,6 +1,6 @@
 Name:          xorgproto
 Version:       2020.1
-Release:       1mamba
+Release:       2mamba
 Summary:       X.org prototypes
 Group:         Development/Libraries
 Vendor:        openmamba
@@ -10,7 +10,6 @@ URL:           https://x.org
 Source:        ftp://ftp.x.org/pub/individual/proto/xorgproto-%{version}.tar.gz
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: libXt-devel
 ## AUTOBUILDREQ-END
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -67,8 +66,6 @@ Provides:      xf86vidmodeproto-devel
 Obsoletes:     xf86vidmodeproto-devel
 Provides:      xineramaproto-devel
 Obsoletes:     xineramaproto-devel
-Provides:      xproxymanagementprotocol-devel
-Obsoletes:     xproxymanagementprotocol-devel
 Provides:      xorg-proto-devel
 Obsoletes:     xorg-proto-devel
 
@@ -152,6 +149,9 @@ This package contains header files for developing applications that use X.org.
 %doc AUTHORS
 
 %changelog
+* Thu Dec 10 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 2020.1-2mamba
+- don't obsolete xproxymanagementprotocol-devel
+
 * Tue Apr 28 2020 Automatic Build System <autodist@mambasoft.it> 2020.1-1mamba
 - automatic version update by autodist