--- a/setup.py	Mon Jul 28 13:14:53 2014 +0300
+++ b/setup.py	Mon Jul 28 13:33:13 2014 +0300
@@ -18,7 +18,7 @@
     install_requires    = [
         # pvl.args
         # pvl.invoke
-        'pvl-common >= 0.2',
+        'pvl-common >= 0.5.1',
     ],
  
     # lib