diff --git a/browser_cli/models.py b/browser_cli/models.py
index 066a924..9371fd8 100644
--- a/browser_cli/models.py
+++ b/browser_cli/models.py
@@ -29,9 +29,9 @@ class Tab:
     id: int
     window_id: int
     active: bool
-    muted: bool
-    title: str
-    url: str
+    muted: bool = False
+    title: str = ""
+    url: str = ""
     group_id: int | None = None
     browser: str | None = None
     _browser: BrowserCLI | None = field(default=None, repr=False, compare=False, init=False)