diff --git a/docs/docsite/requirements.txt b/docs/docsite/requirements.txt
index 1290ac1df09..0b8ecd60b32 100644
--- a/docs/docsite/requirements.txt
+++ b/docs/docsite/requirements.txt
@@ -2,8 +2,8 @@
 jinja2
 PyYAML
 rstcheck
-sphinx==2.1.2 
-sphinx-notfound-page
+sphinx==2.1.2
+sphinx-notfound-page >= 0.6
 Pygments >= 2.4.0
 straight.plugin # Needed for hacking/build-ansible.py which is the backend build script
-antsibull >= 0.15.0
+antsibull >= 0.25.0