diff --git a/src/v1/mod.rs b/src/v1/mod.rs
index 0d4df35..9804f0f 100644
--- a/src/v1/mod.rs
+++ b/src/v1/mod.rs
@@ -1,3 +1,6 @@
+// This version is based on the MISP API specification as committed in 0bded9c30fa83a70154b262081494c682220c19e
+// https://github.com/MISP/MISP/blob/0bded9c30fa83a70154b262081494c682220c19e/app/webroot/doc/openapi.yaml
+
 macro_rules! default_derive {
     ($i:item) => {
         use serde::{Serialize, Deserialize};