1 files changed, 2 insertions, 0 deletions
diff --git a/setup.cfg b/setup.cfg
index 08a38b4..44ccf0b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -35,6 +35,8 @@ zip_safe = false
 include_package_data = true
 python_requires = >=3.7
 packages = find:
+install_requires =
+    typing_extensions; python_version<="3.7"
 
 [options.package_data]
 * = py.typed