diff --git a/docs/source/conf.py b/docs/source/conf.py
index 504a816306212d8e2cb293e8e81c1aa804d6115b..216a7809628d750b3384cdfe47906b5a0303c8c6 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -22,8 +22,9 @@ project = 'psimpy'
 copyright = f'{date.today().year}, Hu Zhao'
 author = 'Hu Zhao'
 
-# import psimpy
-# version = psimpy.__version__
+import psimpy
+version = psimpy.__version__
+release = version
 
 
 # -- General configuration ---------------------------------------------------