diff --git a/apps/backend/src/app/api/latest/internal/email-themes/[id]/route.tsx b/apps/backend/src/app/api/latest/internal/email-themes/[id]/route.tsx
index f30090bbe..70f76b1b6 100644
--- a/apps/backend/src/app/api/latest/internal/email-themes/[id]/route.tsx
+++ b/apps/backend/src/app/api/latest/internal/email-themes/[id]/route.tsx
@@ -62,7 +62,7 @@ export const DELETE = createSmartRouteHandler({
       tenancy: adaptSchema.defined(),
     }).defined(),
     params: yupObject({
-      id: yupString().defined(),
+      id: yupString().uuid().defined(),
     }).defined(),
   }),
   response: yupObject({