diff --git a/requirements.txt b/requirements.txt
index c15dab828c..a54b6cc97a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ myst-parser==0.18.0
 ablog==0.10.31  # pyup: ignore
 
 # Sphinx (checked with 4.3) requires docutils=<0.18
-docutils==0.17.1   # pyup: <0.18
+docutils==0.21.2   # pyup: <0.18
 PyYAML==6.0.2 
 pytz==2024.2