diff --git a/src/session/config.rs b/src/session/config.rs
index cdf3d17..6a16e04 100644
--- a/src/session/config.rs
+++ b/src/session/config.rs
@@ -30,7 +30,7 @@ pub struct Session {
     pub passphrase: String,
     #[serde(default)]
     pub last_used: Option<String>,
-    #[serde(default)]
+    #[serde(default = "default_global_proxy_type")]
     pub proxy_type: String, // "none", "socks5", "http"
     #[serde(default)]
     pub proxy_host: String,
diff --git a/src/session/mod.rs b/src/session/mod.rs
index 0ecfddb..f5af267 100644
--- a/src/session/mod.rs
+++ b/src/session/mod.rs
@@ -198,7 +198,11 @@ impl Ashell {
             window,
             cx,
         );
-        self.ssh_proxy_type = session.proxy_type.clone();
+        self.ssh_proxy_type = if session.proxy_type.is_empty() {
+            "none".to_string()
+        } else {
+            session.proxy_type.clone()
+        };
         Self::set_input_value(&self.proxy_host_input, session.proxy_host.clone(), window, cx);
         Self::set_input_value(
             &self.proxy_port_input,