diff --git a/control_plane/src/attachment_service.rs b/control_plane/src/attachment_service.rs
index a49bef038c..d9bc369b60 100644
--- a/control_plane/src/attachment_service.rs
+++ b/control_plane/src/attachment_service.rs
@@ -24,10 +24,8 @@ pub struct AttachHookResponse {
     pub gen: Option<u32>,
 }
 
-#[serde_as]
 #[derive(Serialize, Deserialize)]
 pub struct InspectRequest {
-    #[serde_as(as = "DisplayFromStr")]
     pub tenant_id: TenantId,
 }