diff --git a/javapackages-tools.spec b/javapackages-tools.spec
index 46d8de9..89e8c48 100644
--- a/javapackages-tools.spec
+++ b/javapackages-tools.spec
@@ -24,13 +24,13 @@ BuildRequires:  python3-devel
 BuildRequires:  python3-lxml
 BuildRequires:  python3-setuptools
 BuildRequires:  python3-nose
-BuildRequires:  python3-PyXB = 1.2.4
+BuildRequires:  python3-six
 %else
 BuildRequires:  python2-devel
 BuildRequires:  python-lxml
 BuildRequires:  python-setuptools
 BuildRequires:  python-nose
-BuildRequires:  PyXB = 1.2.4
+BuildRequires:  python-six
 %endif
 BuildRequires:  make
 BuildRequires:  asciidoc
@@ -125,8 +125,8 @@ artifact resolution using XMvn resolver.
 %if 0%{?with_python3}
 %package -n python3-javapackages
 Summary:        Module for handling various files for Java packaging
-Requires:       python3-PyXB = 1.2.4
 Requires:       python3-lxml
+Requires:       python3-six
 Obsoletes:      python-javapackages < %{version}-%{release}
 
 %description -n python3-javapackages
@@ -136,8 +136,8 @@ packaging in Linux distributions
 %else # python2
 %package -n python-javapackages
 Summary:        Module for handling various files for Java packaging
-Requires:       PyXB = 1.2.4
 Requires:       python-lxml
+Requires:       python-six
 Obsoletes:      python3-javapackages < %{version}-%{release}
 
 %description -n python-javapackages