diff --git a/ndpi.spec b/ndpi.spec
index b32ad67..18c351e 100644
--- a/ndpi.spec
+++ b/ndpi.spec
@@ -1,5 +1,5 @@
 Name:          ndpi
-Version:       3.4
+Version:       4.0
 Release:       1mamba
 Summary:       A library for deep-packet inspection
 Group:         System/Libraries
@@ -11,13 +11,11 @@ Source:        https://github.com/ntop/nDPI.git/%{version}/nDPI-%{version}.tar.b
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: ldconfig
 BuildRequires: libgcrypt-devel
-BuildRequires: libgpg-error-devel
+BuildRequires: libjson-c-devel
 BuildRequires: libpcap-devel
 ## AUTOBUILDREQ-END
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 nDPI® is an open source LGPLv3 library for deep-packet inspection. Based on OpenDPI it includes ntop extensions. We have tried to push them into the OpenDPI source tree but nobody answered emails so we have decided to create our own source tree
@@ -80,5 +78,8 @@ This package contains libraries and header files for developing applications tha
 %doc README.md README.nDPI README.protocols
 
 %changelog
+* Sat Jul 31 2021 Automatic Build System <autodist@mambasoft.it> 4.0-1mamba
+- automatic version update by autodist
+
 * Mon Dec 14 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 3.4-1mamba
 - package created using the webbuild interface