keep version in separate file
diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index 4391764..60bec4f 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -1 +1 @@
-__version__ = '4.0.2'
+from erpnext.__version__ import __version__