diff --git a/docs/requirements.txt b/docs/requirements.txt
index e09aa745e..4fe149e4c 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,6 @@
-sphinx
-sphinx_rtd_theme
-recommonmark
-sphinx-markdown-tables
+sphinx == 4.5.0
+sphinx_rtd_theme == 1.0.0
+recommonmark == 0.7.1
+sphinx-markdown-tables == 0.0.15
 sphinx-copybutton == 0.2.11
-sphinx-md
+sphinx-md == 0.0.3
diff --git a/examples/memcached.md b/examples/memcached.md
index f78dd22da..3c96f13d6 100644
--- a/examples/memcached.md
+++ b/examples/memcached.md
@@ -315,8 +315,7 @@ persistentvolumeclaim "memcached-data-volume-pmem-memcached-0" deleted
 ## KubeDB
 
 The [KubeDB operator](https://kubedb.com) >= 0.14.0-beta.1 has
-[changes](https://github.com/kubedb/memcached/pull/146) that enable
-the usage of PMEM in ephemeral volumes. Management of persistent
+support for usage of PMEM in ephemeral volumes. Management of persistent
 volumes and thus the restartable cache feature are not supported.
 
 At this time, the upstream install instructions do not cover