diff --git a/AgileWorks/AgileWorks/App/RootViewController.swift b/AgileWorks/AgileWorks/App/RootViewController.swift
index d88c6deba8902ec69c1830e8f848c799461ef2d7..3aa236373982c79885aa6306f1a32237b8f39747 100644
--- a/AgileWorks/AgileWorks/App/RootViewController.swift
+++ b/AgileWorks/AgileWorks/App/RootViewController.swift
@@ -98,20 +98,19 @@ extension RootViewController {
     }
 
     func deleteServerInfo(serverNumber: Int?) {
-        DeviceService().deleteDevice(serverNumber: serverNumber) { result in
-           switch result {
-           case .success:
-               break
-           case .failure(let error):
-               log.e(error)
-           }
-            KeychainDataStore().removeOAuthState(serverNumber: serverNumber)
-            KeychainDataStore().removeAccessToken(serverNumber: serverNumber)
-            KeychainDataStore().removeDeviceID(serverNumber: serverNumber)
-            KeychainDataStore().removeSessionID(serverNumber: serverNumber)
-            KeychainDataStore().removeSessionAPICookie(serverNumber: serverNumber)
-            KeychainDataStore().removeCookieHeader(serverNumber: serverNumber)
+        FirebaseSupport.removeInstanceID { error in
+            if let error = error {
+                log.e(error)
+            }
         }
+        
+        KeychainDataStore().removeOAuthState(serverNumber: serverNumber)
+        KeychainDataStore().removeAccessToken(serverNumber: serverNumber)
+        KeychainDataStore().removeDeviceID(serverNumber: serverNumber)
+        KeychainDataStore().removeSessionID(serverNumber: serverNumber)
+        KeychainDataStore().removeSessionAPICookie(serverNumber: serverNumber)
+        KeychainDataStore().removeCookieHeader(serverNumber: serverNumber)
+        
         //認証情報削除
         KeychainDataStore().removeSystemName()
         KeychainDataStore().removeLanguage()