diff --git a/rtd-requirements.txt b/rtd-requirements.txt
index 883b3c351..2299d1ebc 100644
--- a/rtd-requirements.txt
+++ b/rtd-requirements.txt
@@ -1,5 +1,5 @@
 -r requirements.txt
 jinja2
-sphinx==3.5.0
+sphinx==3.5.1
 sphinx_rtd_theme
 sphinxcontrib-autoprogram