diff --git a/README.md b/README.md
index 0a589c5b..310aee70 100644
--- a/README.md
+++ b/README.md
@@ -81,3 +81,6 @@ bazel test //... --config=macos-asan -c dbg
 # License
 
 See [LICENSE](LICENSE) and [NOTICE.md](NOTICE.md)
+
+
+This is mooc only.