diff --git a/docs/source/requirements.txt b/docs/source/requirements.txt
index edc3e7b..72357fc 100644
--- a/docs/source/requirements.txt
+++ b/docs/source/requirements.txt
@@ -1,2 +1,2 @@
 sphinx>=9.1.0
-pydata-sphinx-theme>=0.20.0
+pydata-sphinx-theme>=0.21.0