remove dependency on b2

diff --git a/configure.in b/configure.in
index bec3252..691fa64 100644
--- a/configure.in
+++ b/configure.in
@@ -15,7 +15,7 @@
 WSMAN_PKG=$PACKAGE_NAME
 AC_SUBST(WSMAN_PKG)
 
-PKG_CHECK_MODULES(OPENWSMAN, [openwsman >= 2.0.0b2])
+PKG_CHECK_MODULES(OPENWSMAN, [openwsman >= 2.0.0])
 have_cunit=no
 AC_CHECK_HEADERS([CUnit/Basic.h], have_cunit="yes" )
 AM_CONDITIONAL(BUILD_CUNIT_TESTS, test "$have_cunit" == "yes")