diff --git a/v2rayN/v2rayN/Handler/ConfigHandler.cs b/v2rayN/v2rayN/Handler/ConfigHandler.cs
index 660f12ee..4f7908af 100644
--- a/v2rayN/v2rayN/Handler/ConfigHandler.cs
+++ b/v2rayN/v2rayN/Handler/ConfigHandler.cs
@@ -638,7 +638,7 @@ namespace v2rayN.Handler
             }
             if (Utils.IsNullOrEmpty(profileItem.allowInsecure))
             {
-                profileItem.allowInsecure = config.defAllowInsecure.ToString();
+                profileItem.allowInsecure = config.defAllowInsecure.ToString().ToLower();
             }
 
             AddServerCommon(ref config, profileItem);
@@ -750,7 +750,7 @@ namespace v2rayN.Handler
             profileItem.configVersion = 2;
             if (Utils.IsNullOrEmpty(profileItem.allowInsecure))
             {
-                profileItem.allowInsecure = config.defAllowInsecure.ToString();
+                profileItem.allowInsecure = config.defAllowInsecure.ToString().ToLower();
             }
             if (!Utils.IsNullOrEmpty(profileItem.network) && !Global.networks.Contains(profileItem.network))
             {
diff --git a/v2rayN/v2rayN/Handler/CoreConfigHandler.cs b/v2rayN/v2rayN/Handler/CoreConfigHandler.cs
index ae017d47..617581cd 100644
--- a/v2rayN/v2rayN/Handler/CoreConfigHandler.cs
+++ b/v2rayN/v2rayN/Handler/CoreConfigHandler.cs
@@ -554,7 +554,7 @@ namespace v2rayN.Handler
 
                     TlsSettings tlsSettings = new TlsSettings
                     {
-                        allowInsecure = Utils.ToBool(node.allowInsecure),
+                        allowInsecure = Utils.ToBool(node.allowInsecure.IsNullOrEmpty() ? config.defAllowInsecure.ToString().ToLower() : node.allowInsecure),
                         alpn = node.GetAlpn(),
                         fingerprint = node.fingerprint
                     };
@@ -576,7 +576,7 @@ namespace v2rayN.Handler
 
                     TlsSettings xtlsSettings = new TlsSettings
                     {
-                        allowInsecure = Utils.ToBool(node.allowInsecure),
+                        allowInsecure = Utils.ToBool(node.allowInsecure.IsNullOrEmpty() ? config.defAllowInsecure.ToString().ToLower() : node.allowInsecure),
                         alpn = node.GetAlpn(),
                         fingerprint = node.fingerprint
                     };