diff --git a/docs/mkdocs/requirements.txt b/docs/mkdocs/requirements.txt
index c3e41fd..0ffa92a 100644
--- a/docs/mkdocs/requirements.txt
+++ b/docs/mkdocs/requirements.txt
@@ -2,5 +2,5 @@
 mkdocs == 1.4.0
 mkdocs-material == 8.5.6
 mkdocs-material-extensions == 1.0.3
-pymdown-extensions == 10.16.1
+pymdown-extensions == 10.21.3
 mkdocstrings-python == 0.7.1