diff --git a/VirtualBox.spec b/VirtualBox.spec
index 8011253..5e0646e 100644
--- a/VirtualBox.spec
+++ b/VirtualBox.spec
@@ -17,14 +17,14 @@
 %endif
 
 Name:          VirtualBox
-Version:       6.1.16
+Version:       6.1.18
 Release:       1mamba
 Summary:       A general-purpose full virtualizer for x86 hardware
 Group:         Graphical Desktop/Applications/Utilities
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Stefano Cotta Ramusino <stefano.cotta@openmamba.org>
-URL:           http://www.virtualbox.org/
+URL:           https://www.virtualbox.org/
 # 6.1.12: real source is 6.1.12a
 Source0:       http://download.virtualbox.org/virtualbox/%{version}/VirtualBox-%{version}.tar.bz2
 Source1:       %{name}-wrapper
@@ -85,13 +85,18 @@ BuildRequires: libalsa-devel
 BuildRequires: makeself
 BuildRequires: tetex-latex
 BuildRequires: latex-ucs
-BuildRequires: latex-font-bera
+BuildRequires: texlive-fonts
 BuildRequires: gsoap-devel
 BuildRequires: jdk
 BuildRequires: librtmp-devel
 %ifarch x86_64
 BuildRequires: glibc-multilib-devel
 %endif
+BuildRequires: java-openjdk8
+# NOTE: as of 6.1.18 build is not compatibile with Java 11
+#BuildRequires: java-environment
+#BuildRequires: java-jaxws
+#BuildRequires: java-jws-api
 Provides:      kernelvboxdrv
 Obsoletes:     kernelvboxdrv
 Requires(post):kernelheaders
@@ -99,7 +104,6 @@ Requires(post):dkms
 Requires(post):libelf-devel
 Provides:      virtualbox
 Obsoletes:     virtualbox
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 VirtualBox is a general-purpose full virtualizer for x86 hardware.
@@ -206,7 +210,8 @@ VBOX_WITH_TESTCASES=
 VBOX_WITH_TESTSUITE=
 VBOX_WITH_VALIDATIONKIT=
 #VBOX_VERSION_STRING=\$(VBOX_VERSION_MAJOR).\$(VBOX_VERSION_MINOR).\$(VBOX_VERSION_BUILD)_openmamba
-VBOX_JAVA_HOME=%{_jvmdir}/jdk
+# FIXME: as of 6.1.18 build is not compatible with java 11
+VBOX_JAVA_HOME=%{_jvmdir}/java-8
 # fix gsoap missing zlib include and produce errors with --as-needed
 VBOX_GSOAP_CXX_LIBS=gsoapssl++ z
 # use system xorg
@@ -692,6 +697,9 @@ fi
 #%{_prefix}/src/vboxvideo-%{version}/*
 
 %changelog
+* Sun Feb 28 2021 Automatic Build System <autodist@mambasoft.it> 6.1.18-1mamba
+- automatic version update by autodist
+
 * Mon Oct 26 2020 Automatic Build System <autodist@mambasoft.it> 6.1.16-1mamba
 - automatic version update by autodist