diff --git a/auth/middleware.go b/auth/middleware.go
index 63a477ef6846331ce169dfa32bd9c1129c34e270..a82888a67ea48279a40fe8b37e777197180ebba5 100644
--- a/auth/middleware.go
+++ b/auth/middleware.go
@@ -83,7 +83,11 @@ }
 
 func authError(w http.ResponseWriter, reason string, code int) {
 	gqlerr := gqlerror.Errorf("Authentication error: %s", reason)
-	b, err := json.Marshal(gqlerr)
+	b, err := json.Marshal(struct {
+		Errors []*gqlerror.Error `json:"errors"`
+	} {
+		Errors: []*gqlerror.Error{gqlerr},
+	})
 	if err != nil {
 		panic(err)
 	}
@@ -708,7 +712,7 @@ 			}
 
 			auth := r.Header.Get("Authorization")
 			if auth == "" {
-				authError(w, `Authorization header is required. Expected 'Authorization: Bearer <token>'`, http.StatusUnauthorized)
+				authError(w, `Authorization header is required. Expected 'Authorization: Bearer [token]'`, http.StatusUnauthorized)
 				return
 			}