diff --git a/doc-requirements.txt b/doc-requirements.txt
index d5f921e3331..596c0729c1e 100644
--- a/doc-requirements.txt
+++ b/doc-requirements.txt
@@ -1,5 +1,5 @@
 doc8
 m2r
-sphinx<2
+sphinx<3.3.0
 sphinx_rtd_theme
 pyyaml