diff --git a/gen/pb-rust/Cargo.toml b/gen/pb-rust/Cargo.toml
index 772eb7a2..986128f5 100644
--- a/gen/pb-rust/Cargo.toml
+++ b/gen/pb-rust/Cargo.toml
@@ -5,3 +5,4 @@ members = [
     "sigstore-protobuf-specs-codegen",
     "sigstore-protobuf-specs-derive",
 ]
+license = "Apache-2.0"