diff --git a/kig.spec b/kig.spec
index 7331506..bbe4150 100644
--- a/kig.spec
+++ b/kig.spec
@@ -1,6 +1,6 @@
 Name:          kig
 Version:       24.02.2
-Release:       1mamba
+Release:       2mamba
 Summary:       Interactive Geometry
 Group:         Graphical Desktop/Applications/Educational
 Vendor:        openmamba
@@ -44,6 +44,7 @@ BuildRequires: qt5-qtbase-devel
 ## AUTOBUILDREQ-END
 BuildRequires: cmake
 BuildRequires: extra-cmake-modules
+BuildRequires: libboost-devel >= 1.85.0-2mamba
 Provides:      kig4 = %{?epoch:%epoch:}%{version}-%{release}
 Obsoletes:     kig4 < 21.08.0
 
@@ -124,6 +125,9 @@ exit 0
 %doc AUTHORS LICENSES
 
 %changelog
+* Sat Apr 20 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 24.02.2-2mamba
+- rebuilt with libboost (python-boost-py3) 1.85.0
+
 * Sat Apr 13 2024 Automatic Build System <autodist@openmamba.org> 24.02.2-1mamba
 - automatic version update by autodist