diff --git a/kalzium.spec b/kalzium.spec
index d49b5e3..c92c7f3 100644
--- a/kalzium.spec
+++ b/kalzium.spec
@@ -1,5 +1,5 @@
 Name:          kalzium
-Version:       21.08.1
+Version:       21.08.2
 Release:       1mamba
 Summary:       Periodic table of elements
 Group:         Graphical Desktop/Applications/Educational
@@ -11,6 +11,7 @@ Source:        https://download.kde.org/stable/release-service/%{version}/src/ka
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
+BuildRequires: libX11-devel
 BuildRequires: libgcc
 BuildRequires: libkauth-devel
 BuildRequires: libkcodecs-devel
@@ -128,6 +129,9 @@ exit 0
 %{_kde5_libdir}/libscience.so
 
 %changelog
+* Fri Oct 08 2021 Automatic Build System <autodist@mambasoft.it> 21.08.2-1mamba
+- automatic version update by autodist
+
 * Thu Sep 02 2021 Automatic Build System <autodist@mambasoft.it> 21.08.1-1mamba
 - automatic version update by autodist