diff --git a/setup.py b/setup.py
index b72d009..a78c1a4 100644
--- a/setup.py
+++ b/setup.py
@@ -91,7 +91,7 @@ def create_extensions():
             "pooch"
         ]
     },
-    python_requires=">=3.7",
+    python_requires=">=3.9",  # transonic requires >= 3.9
     cmdclass={"build_ext": ParallelBuildExt},
     ext_modules=create_extensions(),
 )