diff --git a/step.spec b/step.spec
index 6ef295a..7aa160c 100644
--- a/step.spec
+++ b/step.spec
@@ -1,5 +1,5 @@
 Name:          step
-Version:       19.08.3
+Version:       19.12.0
 Release:       1mamba
 Summary:       Interactive Physical Simulator
 Group:         Graphical Desktop/Applications/Educational
@@ -7,7 +7,7 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Davide Madrisan <davide.madrisan@gmail.com>
 URL:           http://www.kde.org/applications/education/step
-Source:        http://download.kde.org/stable/applications/%{version}/src/step-%{version}.tar.xz
+Source:        http://download.kde.org/stable/release-service/%{version}/src/step-%{version}.tar.xz
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: cln-devel
@@ -140,6 +140,9 @@ exit 0
 #ChangeLog README TODO
 
 %changelog
+* Tue Dec 31 2019 Automatic Build System <autodist@mambasoft.it> 19.12.0-1mamba
+- automatic version update by autodist
+
 * Fri Nov 08 2019 Automatic Build System <autodist@mambasoft.it> 19.08.3-1mamba
 - automatic version update by autodist