diff --git a/doc/requirements.txt b/doc/requirements.txt
index 3958ea11..0d1f8577 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -3,12 +3,12 @@
 # process, which may cause wedges in the gate later.
 
 # Documentation
-sphinx>2.1.0
-oslosphinx>=4.7.0 # Apache-2.0
-sphinx_rtd_theme
+sphinx==3.1.0
+oslosphinx==4.18.0 # Apache-2.0
+sphinx_rtd_theme==0.4.3
 
 # UML image generation
-plantuml
+plantuml==0.3.0
 
 # Releasenotes
-reno>=2.5.0 # Apache-2.0
+reno==3.1.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index a28c37ee..0d08e006 100644
--- a/tox.ini
+++ b/tox.ini
@@ -67,7 +67,7 @@ deps =
   safety
 commands =
   pipenv check
-  safety check -r {toxinidir}/doc/requirements.txt --full-report
+  safety check -r {toxinidir}/requirements.txt -r {toxinidir}/doc/requirements.txt --full-report
 
 [testenv:cover]
 basepython = python3