diff --git a/pyproject.toml b/pyproject.toml
index 60c8cbf..ccbb9e6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ typing-extensions = {version = "*", python = "^3.11.3", optional = true}
 # Sphinx documentation dependencies
 Sphinx = { version = "~4", optional = true }
 sphinx-autodoc-typehints = { version = "~1", optional = true }
-pydata-sphinx-theme = { version = "~0.9", optional = true }
+pydata-sphinx-theme = { version = "~0.16.0", optional = true }
 
 [tool.poetry.extras]
 regular = ["ibm-cos-sdk", "typing-extensions"]