diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index 942f969..535dfc6 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -342,6 +342,10 @@
 
   .. _2.48: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id43
 
+  * `2.55`_
+
+  .. _2.55: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id49
+
   * `2.60`_
 
   .. _2.60: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id54