diff --git a/requirements-docs.txt b/requirements-docs.txt
index e6674f70..2e76e73f 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -40,7 +40,7 @@ snowballstemmer==2.0.0
     # via sphinx
 sphinx-rtd-theme==0.5.1
     # via -r requirements-docs.in
-sphinx==3.4.3
+sphinx==3.5.0
     # via
     #   -r requirements-docs.in
     #   sphinx-rtd-theme