diff --git a/scribus.spec b/scribus.spec
index 7c0022c..fcf362a 100644
--- a/scribus.spec
+++ b/scribus.spec
@@ -1,6 +1,6 @@
 Name:          scribus
 Version:       1.5.7
-Release:       1mamba
+Release:       2mamba
 Summary:       Open Source Page Layout program
 Group:         Graphical Desktop/Applications/Graphics
 Vendor:        openmamba
@@ -12,7 +12,6 @@ Source1:       scribus-mimelnk
 Patch0:        scribus-1.5.6.1-podofo-0.9.7.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: OpenSceneGraph
 BuildRequires: glibc-devel
 BuildRequires: libcairo-devel
 BuildRequires: libcdr-devel
@@ -27,6 +26,7 @@ BuildRequires: libicu-devel
 BuildRequires: libjpeg-devel
 BuildRequires: liblcms2-devel
 BuildRequires: libmspub-devel
+BuildRequires: libosg-devel
 BuildRequires: libpagemaker-devel
 BuildRequires: libpng-devel
 BuildRequires: libpodofo-devel
@@ -42,6 +42,7 @@ BuildRequires: libxml2-devel
 BuildRequires: libz-devel
 BuildRequires: libzmf-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libosg-devel >= 3.6.5
 BuildRequires: libpodofo-devel >= 0.9.7-1mamba
 BuildRequires: perl >= 5.8.0
 
@@ -131,6 +132,9 @@ This package contains static libraries and header files needed for development.
 %doc AUTHORS COPYING
 
 %changelog
+* Wed Jun 23 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.5.7-2mamba
+- rebuilt with OpenSceneGraph 3.6.5
+
 * Tue May 04 2021 Automatic Build System <autodist@mambasoft.it> 1.5.7-1mamba
 - automatic version update by autodist