diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index 572d425..adbd2dc 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -247,3 +247,9 @@
  * `2.42`_
 
  .. _2.42: http://docs.openstack.org/developer/nova/api_microversion_history.html#maximum-in-ocata
+
+* Volume
+
+ * `3.3`_
+
+ .. _3.3:  https://docs.openstack.org/developer/cinder/devref/api_microversion_history.html#id4