diff --git a/server/server_firebase.go b/server/server_firebase.go
index 1b80172e..13e80b93 100644
--- a/server/server_firebase.go
+++ b/server/server_firebase.go
@@ -80,7 +80,7 @@ type firebaseSenderImpl struct {
 }
 
 func newFirebaseSender(credentialsFile string) (firebaseSender, error) {
-	fb, err := firebase.NewApp(context.Background(), nil, option.WithCredentialsFile(credentialsFile))
+	fb, err := firebase.NewApp(context.Background(), nil, option.WithAuthCredentialsFile(option.ServiceAccount, credentialsFile))
 	if err != nil {
 		return nil, err
 	}
diff --git a/tools/fbsend/main.go b/tools/fbsend/main.go
index 832aeb79..9c5e9f70 100644
--- a/tools/fbsend/main.go
+++ b/tools/fbsend/main.go
@@ -26,7 +26,7 @@ func main() {
 		}
 		data[kv[0]] = kv[1]
 	}
-	fb, err := firebase.NewApp(context.Background(), nil, option.WithCredentialsFile(*conffile))
+	fb, err := firebase.NewApp(context.Background(), nil, option.WithAuthCredentialsFile(option.ServiceAccount, *conffile))
 	if err != nil {
 		fail(err.Error())
 	}