diff --git a/step.spec b/step.spec
index 834bc02..3b9de08 100644
--- a/step.spec
+++ b/step.spec
@@ -1,6 +1,6 @@
 Name:          step
 Version:       21.04.3
-Release:       1mamba
+Release:       2mamba
 Summary:       Interactive Physical Simulator
 Group:         Graphical Desktop/Applications/Educational
 Vendor:        openmamba
@@ -38,7 +38,7 @@ BuildRequires: libsolid-devel
 BuildRequires: libsonnet-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
-BuildRequires: libqalculate-devel >= 2.6.2-1mamba
+BuildRequires: libqalculate-devel >= 3.20.1-1mamba
 BuildRequires: libeigen2-devel
 BuildRequires: cmake
 
@@ -121,6 +121,9 @@ exit 0
 #ChangeLog README TODO
 
 %changelog
+* Sun Aug 01 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 21.04.3-2mamba
+- rebuilt by autoport with build requirements: libqalculate-devel>=3.20.1-1mamba
+
 * Fri Jul 09 2021 Automatic Build System <autodist@mambasoft.it> 21.04.3-1mamba
 - automatic version update by autodist