diff --git a/docs/docsite/requirements.txt b/docs/docsite/requirements.txt
index 1290ac1df09..f4d1165d0ad 100644
--- a/docs/docsite/requirements.txt
+++ b/docs/docsite/requirements.txt
@@ -2,8 +2,9 @@
 jinja2
 PyYAML
 rstcheck
-sphinx==2.1.2 
+sphinx==2.1.2
 sphinx-notfound-page
 Pygments >= 2.4.0
 straight.plugin # Needed for hacking/build-ansible.py which is the backend build script
 antsibull >= 0.15.0
+docutils==0.16 # pin for now until sphinx_rtd_theme is compatible with 0.17 or later