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diff --git a/README.md b/README.md
index 3fceeed..728d799 100644
--- a/README.md
+++ b/README.md
@@ -72,3 +72,8 @@ Then, build all four PACs.
 ```
 make -j imxrt-chiptool.shootout
 ```
+
+## License
+
+Top-level files are licensed MIT or APACHE-2.0, at your option.
+Submodules carry their own licenses.