diff --git a/GmailAPIHelper/GmailHelper.cs b/GmailAPIHelper/GmailHelper.cs
index 8f774fe..ab7e373 100644
--- a/GmailAPIHelper/GmailHelper.cs
+++ b/GmailAPIHelper/GmailHelper.cs
@@ -141,7 +141,6 @@ public static GmailService GetGmailService(string applicationName, TokenPathType
                     new FileDataStore(credPath, true)).Result;
             }
             //Create Gmail API service.
-            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
             var service = new GmailService(new BaseClientService.Initializer()
             {
                 HttpClientInitializer = credential,