diff --git a/doc/python_api/requirements.txt b/doc/python_api/requirements.txt
index c2b5b2fd794..263b12eb604 100644
--- a/doc/python_api/requirements.txt
+++ b/doc/python_api/requirements.txt
@@ -1,2 +1,2 @@
-Sphinx==1.8.5
-sphinx_rtd_theme==0.4.3
+Sphinx==3.0.3
+sphinx_rtd_theme==0.5.0rc1