diff --git a/Cargo.toml b/Cargo.toml
index d3a34ea..e560aae 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "daqbuf-serde-helper"
 version = "0.0.1"
 authors = ["Dominik Werder <dominik.werder@gmail.com>"]
+license = "GPL-3.0-only"
 edition = "2024"
 
 [dependencies]