diff --git a/python/stepspy0.7/howto b/python/stepspy0.7/howto
index cffc8f22..2a0ac183 100644
--- a/python/stepspy0.7/howto
+++ b/python/stepspy0.7/howto
@@ -1,3 +1,7 @@
+1. install wheel and twine, use:
+
+python -m pip install wheel twine
+
 1. to build stepspy module, use:
 
 python setup.py sdist bdist_wheel
diff --git a/python/stepspy0.7/setup.py b/python/stepspy0.7/setup.py
index 6cd41564..0a850f35 100644
--- a/python/stepspy0.7/setup.py
+++ b/python/stepspy0.7/setup.py
@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="stepspy",
-    version="0.6.1",
+    version="0.7",
     author="Changgang Li",
     author_email="lichgang@sdu.edu.cn",
     description="Python module of Simulation Toolkit for Electrical Power Systems",