diff --git a/javapackages-tools.spec b/javapackages-tools.spec
index 23514f5..12cb7c3 100644
--- a/javapackages-tools.spec
+++ b/javapackages-tools.spec
@@ -19,7 +19,7 @@ BuildRequires:  python-formencode
 BuildRequires:  scl-utils-build
 BuildRequires:  python-nose
 BuildRequires:  dia
-BuildRequires:  PyXB
+BuildRequires:  PyXB >= 1.2.3
 
 Requires:       coreutils
 Requires:       libxslt
@@ -103,7 +103,7 @@ artifact resolution using XMvn resolver.
 
 %package -n python-javapackages
 Summary:        Module for handling various files for Java packaging
-Requires:       PyXB
+Requires:       PyXB >= 1.2.3
 Requires:       python-lxml
 
 %description -n python-javapackages