diff --git a/sdks/python/tox.ini b/sdks/python/tox.ini
index ca3e0b863740..4fc99d3da1b5 100644
--- a/sdks/python/tox.ini
+++ b/sdks/python/tox.ini
@@ -142,6 +142,7 @@ extras = test,gcp,docs,interactive,dataframe
 deps =
   Sphinx==1.8.5
   sphinx_rtd_theme==0.4.3
+  docutils<0.18
 commands =
   time {toxinidir}/scripts/generate_pydoc.sh