diff --git a/requirements.txt b/requirements.txt
index 8902766bd..c26102c89 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ myst-parser==0.17.2
 ablog==0.10.6  # pyup: ignore
 
 # Sphinx (checked with 4.3) requires docutils=<0.18
-docutils==0.17.1   # pyup: <0.18
+docutils==0.20.1   # pyup: <0.18
 PyYAML>=4.2b1
 
 # Additional libraries