diff --git a/htop.spec b/htop.spec
index bfbbeae..eefecda 100644
--- a/htop.spec
+++ b/htop.spec
@@ -1,5 +1,5 @@
 Name:          htop
-Version:       3.1.0
+Version:       3.1.1
 Release:       1mamba
 Summary:       An interactive process viewer for Linux
 Group:         System/Tools
@@ -16,6 +16,7 @@ BuildRequires: glibc-devel
 BuildRequires: libcap-devel
 BuildRequires: libncurses-devel
 BuildRequires: libnl-devel
+BuildRequires: libunwind-devel
 ## AUTOBUILDREQ-END
 
 %description
@@ -54,6 +55,9 @@ It is a text-mode application (for console or X terminals) and requires ncurses.
 # ChangeLog NEWS README TODO
 
 %changelog
+* Fri Oct 15 2021 Automatic Build System <autodist@mambasoft.it> 3.1.1-1mamba
+- automatic version update by autodist
+
 * Tue Sep 21 2021 Automatic Build System <autodist@mambasoft.it> 3.1.0-1mamba
 - automatic version update by autodist