diff --git a/setup.py b/setup.py
index 343006932..585db19a5 100644
--- a/setup.py
+++ b/setup.py
@@ -39,4 +39,5 @@
     extras_require={
         ':python_version=="2.7"': ['typing>=3.6'],  # allow typehinting PY2
     },
+    license="apache2",
 )