diff --git a/Cargo.toml b/Cargo.toml
index 39188b0..c57301e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 description = "spawn leanify subprocesses"
 authors = ["Avril <flanchan@cumallover.me>"]
 edition = "2018"
+license = "gpl-3.0-or-later"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html