diff --git a/README.md b/README.md
index 41367fe..f3b8770 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,5 @@ I dunno. Just for fun, mostly.
 ## Can I contribute?
 
 Yeah, sure. Please do.
+
+Please note, though, that all contributions will be treated as licensed under MPL-2.0. This is so that we can relicense to MPL-2.0 at some point in the future if we manage to move away from poppler as a backend (since that is the only dependency, at time of writing, which requires the GPLv3 license).