diff --git a/docs/en/conf.py b/docs/en/conf.py
index 83881e2c..107a153e 100644
--- a/docs/en/conf.py
+++ b/docs/en/conf.py
@@ -25,6 +25,7 @@
 version_list = [
     {'name': '1.x', 'number': '/authentication/1', 'title': '1.x', 'current': True},
     {'name': '2.x', 'number': '/authentication/2', 'title': '2.x'},
+    {'name': '3.x', 'number': '/authentication/3', 'title': '3.x'},
 ]
 
 # Languages available.