diff --git a/qcad.spec b/qcad.spec
index 232a6da..a8d7fd3 100644
--- a/qcad.spec
+++ b/qcad.spec
@@ -4,7 +4,7 @@
 %define _huver 2.0.4.0-1
 
 Name:          qcad
-Version:       3.21.2.9
+Version:       3.21.3.14
 Release:       1mamba
 Summary:       A professional 2D CAD system
 Group:         Graphical Desktop/Applications/Graphics
@@ -61,7 +61,7 @@ fi
 #:<< _EOF
 qmake-qt5
 
-%make
+%make -j1
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -146,6 +146,9 @@ EOF
 #% doc qcad/doc qcad/README qcad/data
 
 %changelog
+* Fri Dec 28 2018 Automatic Build System <autodist@mambasoft.it> 3.21.3.14-1mamba
+- automatic version update by autodist
+
 * Thu Sep 13 2018 Automatic Build System <autodist@mambasoft.it> 3.21.2.9-1mamba
 - automatic version update by autodist