diff --git a/README.md b/README.md
index a771c9dee..70eeb35ca 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,10 @@ If you want to contribute to the development of this software
 or you are just interested in building **rust-code-analysis**, have a look at the
 <a href="https://mozilla.github.io/rust-code-analysis/developers/index.html" target="_blank">Developers Guide</a>.
 
-# License
+# Licenses
 
-All the source code of **rust-code-analysis** is released under the
+- Mozilla-defined grammars are released under the MIT license.
+
+- **rust-code-analysis**, **rust-code-analysis-cli** and **rust-code-analysis-web**
+are released under the
 <a href="https://www.mozilla.org/MPL/2.0/" target="_blank">Mozilla Public License v2.0</a>.
diff --git a/tree-sitter-mozcpp/LICENSE b/tree-sitter-mozcpp/LICENSE
new file mode 100644
index 000000000..a9405f7f7
--- /dev/null
+++ b/tree-sitter-mozcpp/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2019 Mozilla Foundation
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/tree-sitter-mozjs/LICENSE b/tree-sitter-mozjs/LICENSE
new file mode 100644
index 000000000..a9405f7f7
--- /dev/null
+++ b/tree-sitter-mozjs/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2019 Mozilla Foundation
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.