diff --git a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
index f46dd42..ac31707 100644
--- a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
@@ -248,6 +248,7 @@ internal class LoginActivity : AppCompatActivity() {
             .setView(clientDialogBinding.root)
             .setPositiveButton(R.string.create, doCreateClient(client, clientDialogEditext))
             .setNegativeButton(R.string.cancel) { _, _ -> onCancelClientDialog() }
+            .setCancelable(false)
             .show()
     }