diff --git a/apps/gpclient/src/connect.rs b/apps/gpclient/src/connect.rs
index 74f058b..8d487ad 100644
--- a/apps/gpclient/src/connect.rs
+++ b/apps/gpclient/src/connect.rs
@@ -281,9 +281,11 @@ impl<'a> ConnectHandler<'a> {
       None
     };
 
+    let os = ClientOs::from(&self.args.os).to_openconnect_os().to_string();
     let vpn = Vpn::builder(gateway, cookie)
       .script(self.args.script.clone())
       .user_agent(self.args.user_agent.clone())
+      .os(Some(os))
       .certificate(self.args.certificate.clone())
       .sslkey(self.args.sslkey.clone())
       .key_password(self.latest_key_password.borrow().clone())
diff --git a/apps/gpgui-helper/package.json b/apps/gpgui-helper/package.json
index 13798d8..784aae0 100644
--- a/apps/gpgui-helper/package.json
+++ b/apps/gpgui-helper/package.json
@@ -32,5 +32,6 @@
     "prettier": "3.1.0",
     "typescript": "^5.0.2",
     "vite": "^4.5.3"
-  }
+  },
+  "packageManager": "pnpm@8.15.7"
 }