1 files changed, 1 insertions, 1 deletions
diff --git a/setup.py b/setup.py
index 9e442b368..f7c56b3a9 100644
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@ tests_require = [
 
 
 docs_extras = [
-    'Sphinx',
+    'Sphinx >= 3.0.0',  # Force RTD to use >2
     'docutils',
     'pylons-sphinx-themes >= 1.0.8',  # Ethical Ads
     'pylons_sphinx_latesturl',