diff --git a/README.md b/README.md
index ec4296ea2e30ce187b04d207dffb78375605616d..1717ef319baa67cf805efecd98f69071b4de66d1 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,12 @@ those fragments.
 
 Please note that the parser is in a very early stage of development and may not
 be working as expected in some cases.
+
+License:
+
+The parser is avialable under a two-clause BSD license.
+
+It uses three other projects:
+* The test cases for the parser originate from [OpenFortran](https://github.com/OpenFortranProject/open-fortran-parser/) and are available under a BSD license.
+* The debugging program [DrAST](https://bitbucket.org/jastadd/drast) from  is also available under a BSD license.
+* The [RATS!](https://cs.nyu.edu/rgrimm/xtc) parser generator is used. Its license is GPL, but the runtime libraries required are LGPL.