diff --git a/pyproject.toml b/pyproject.toml
index d3f0321..0bbbda6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,6 @@ profile = "black"
 # target-version should be all supported versions, see
 # https://github.com/psf/black/issues/751#issuecomment-473066811
 target_version = [
-    "py37",
     "py38",
     "py39",
     "py310",
diff --git a/setup.py b/setup.py
index 8a658e7..e6a8ab6 100644
--- a/setup.py
+++ b/setup.py
@@ -20,8 +20,9 @@
             "systemdspawner = systemdspawner:SystemdSpawner",
         ],
     },
+    python_requires=">=3.8",
     install_requires=[
-        "jupyterhub>=0.9",
-        "tornado>=5.0",
+        "jupyterhub>=2.3.0",
+        "tornado>=5.1",
     ],
 )