diff --git a/cantor.spec b/cantor.spec
index 2bd0d41..6377f2c 100644
--- a/cantor.spec
+++ b/cantor.spec
@@ -1,6 +1,6 @@
 Name:          cantor
 Version:       18.04.2
-Release:       1mamba
+Release:       2mamba
 Summary:       KDE Frontend to Mathematical Software
 Group:         Graphical Desktop/Applications/Educational
 Vendor:        openmamba
@@ -50,6 +50,7 @@ BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
 BuildRequires: cmake
 BuildRequires: libqalculate-devel >= 0.9.7
+BuildRequires: gcc >= 8.1.0
 #Requires:      kde-workspace
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -155,6 +156,9 @@ exit 0
 %{_kde5_libdir}/libcantorlibs.so
 
 %changelog
+* Sun Jun 24 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 18.04.2-2mamba
+- rebuilt with gcc 8.1.0
+
 * Tue Jun 12 2018 Automatic Build System <autodist@mambasoft.it> 18.04.2-1mamba
 - automatic version update by autodist