diff --git a/cloud.insecurity.docker.ipam/Scope.cs b/cloud.insecurity.docker.ipam/Scope.cs
index d46daa6..e7d23e7 100644
--- a/cloud.insecurity.docker.ipam/Scope.cs
+++ b/cloud.insecurity.docker.ipam/Scope.cs
@@ -123,6 +123,7 @@ namespace cloud.insecurity.docker.ipam
             {
                 using (BinaryReader b = new BinaryReader(ms))
                 {
+                    // https://en.wikipedia.org/wiki/Universally_unique_identifier#History
                     return new Guid(
                         b.ReadUInt32(),
                         b.ReadUInt16(),