diff --git a/setup.py b/setup.py
index 4988d27..74f525f 100644
--- a/setup.py
+++ b/setup.py
@@ -101,7 +101,7 @@ def fix_docstring_examples(docstring):
     },
     packages=['tifffile'],
     package_data={'tifffile': ['py.typed']},
-    python_requires='>=3.9',
+    python_requires='>=3.10',
     install_requires=[
         'numpy',
         # 'imagecodecs>=2023.8.12',