diff --git a/pyproject.toml b/pyproject.toml
index ed6c25893c..adbbbb907b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,9 +79,9 @@ gpu = [
     "cupy-cuda12x",
 ]
 docs = [
-    'sphinx<8',
+    'sphinx<9',
     'sphinx-autobuild>=2021.3.14',
-    'sphinx-autoapi<3.1',
+    'sphinx-autoapi<3.4',
     'sphinx_design',
     'sphinx-issues',
     'sphinx-copybutton',