diff --git a/plume-models/src/email_signups.rs b/plume-models/src/email_signups.rs
index 7d005060..fbda656b 100644
--- a/plume-models/src/email_signups.rs
+++ b/plume-models/src/email_signups.rs
@@ -13,6 +13,7 @@ use std::ops::Deref;
 
 const TOKEN_VALIDITY_HOURS: i64 = 2;
 
+#[repr(transparent)]
 pub struct Token(String);
 
 impl From<String> for Token {