diff --git a/pyproject.toml b/pyproject.toml
index 8b87d7a8..001af9a6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
   "sphinx>=8.2",
-  "pydata-sphinx-theme==0.20.0"
+  "pydata-sphinx-theme==0.21.0"
 ]
 
 license = { file = "LICENSE" }