diff --git a/rtd-requirements.txt b/rtd-requirements.txt
index a91dd8fb9..36c117bc9 100644
--- a/rtd-requirements.txt
+++ b/rtd-requirements.txt
@@ -1,5 +1,5 @@
 -r requirements.txt
 jinja2
-sphinx==3.2.1
+sphinx==3.3.1
 sphinx_rtd_theme
 sphinxcontrib-autoprogram