diff --git a/rtd_requirements.txt b/rtd_requirements.txt
index 4c093549..0fe64c68 100644
--- a/rtd_requirements.txt
+++ b/rtd_requirements.txt
@@ -17,7 +17,7 @@ scikit-learn < 1.6
 sphinx < 9.2.0
 sphinx_rtd_theme >= 0.5.2, < 3.2.0
 sphinx-autodoc-typehints < 3.10.0
-sphinx-autoapi < 3.8.0
+sphinx-autoapi < 3.9.0
 sshtunnel < 0.5.0
 urllib3 < 2.7.0
 workalendar < 17.1.0
diff --git a/setup.py b/setup.py
index a07f355c..4cae66e2 100644
--- a/setup.py
+++ b/setup.py
@@ -74,7 +74,7 @@ def read(fname):
     "sphinx < 9.2.0",
     "sphinx_rtd_theme >= 0.5.2, < 3.2.0",
     "sphinx-autodoc-typehints < 3.10.0",
-    "sphinx-autoapi < 3.8.0",
+    "sphinx-autoapi < 3.9.0",
     "astroid == 4.0.3",
 ]