diff --git a/README.md b/README.md
index 74c446e..2f9da80 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ docker-compose up
| `WGUI_ENDPOINT_ADDRESS` | The default endpoint address used in global settings where clients should connect to. The endpoint can contain a port as well, useful when you are listening internally on the `WGUI_SERVER_LISTEN_PORT` port, but you forward on another port (ex 9000). Ex: myvpn.dyndns.com:9000 | Resolved to your public ip address |
| `WGUI_FAVICON_FILE_PATH` | The file path used as website favicon | Embedded WireGuard logo |
| `WGUI_DNS` | The default DNS servers (comma-separated-list) used in the global settings | `1.1.1.1` |
-| `WGUI_MTU` | The default MTU used in global settings | `1450` |
+| `WGUI_MTU` | The default MTU used in global settings | `1420` |
| `WGUI_PERSISTENT_KEEPALIVE` | The default persistent keepalive for WireGuard in global settings | `15` |
| `WGUI_FIREWALL_MARK` | The default WireGuard firewall mark | `0xca6c` (51820) |
| `WGUI_TABLE` | The default WireGuard table value settings | `auto` |
diff --git a/templates/global_settings.html b/templates/global_settings.html
index 73b3c93..f708443 100644
--- a/templates/global_settings.html
+++ b/templates/global_settings.html
@@ -97,7 +97,7 @@ Global Settings
<dt>2. DNS Servers</dt>
<dd>The DNS servers will be set to client config.</dd>
<dt>3. MTU</dt>
- <dd>The MTU will be set to server and client config. By default it is <code>1450</code>. You might want
+ <dd>The MTU will be set to server and client config. By default it is <code>1420</code>. You might want
to adjust the MTU size if your connection (e.g PPPoE, 3G, satellite network, etc) has a low MTU.</dd>
<dd>Leave blank to omit this setting in the configs.</dd>
<dt>4. Persistent Keepalive</dt>
diff --git a/util/config.go b/util/config.go
index 4af6bd2..722fa03 100644
--- a/util/config.go
+++ b/util/config.go
@@ -37,7 +37,7 @@ const (
DefaultServerAddress = "10.252.1.0/24"
DefaultServerPort = 51820
DefaultDNS = "1.1.1.1"
- DefaultMTU = 1450
+ DefaultMTU = 1420
DefaultPersistentKeepalive = 15
DefaultFirewallMark = "0xca6c" // i.e. 51820
DefaultTable = "auto"