diff --git a/Cargo.toml b/Cargo.toml
index 874bff4..de11cc1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@ name = "webhookey"
 version = "0.1.0"
 authors = ["finga <coding@onders.org>"]
 edition = "2018"
+license = "GPL-3.0-or-later"
 
 [dependencies]
 rocket = "0.4"