diff --git a/lib/charms/operator_libs_linux/v2/snap.py b/lib/charms/operator_libs_linux/v2/snap.py
index a706c166..7705feee 100644
--- a/lib/charms/operator_libs_linux/v2/snap.py
+++ b/lib/charms/operator_libs_linux/v2/snap.py
@@ -480,7 +480,7 @@ def stop(self, services: list[str] | None = None, disable: bool = False) -> None
         args = ["stop", "--disable"] if disable else ["stop"]
         self._snap_daemons(args, services)
 
-    def logs(self, services: list[str] | None = None, num_lines: int = 10) -> str:
+    def logs(self, services: list[str] | None = None, num_lines: int | Literal["all"] = 10) -> str:
         """Fetch a snap services' logs.
 
         Args:
diff --git a/tests/unit/test_snap.py b/tests/unit/test_snap.py
index a98c93f4..3b06373b 100644
--- a/tests/unit/test_snap.py
+++ b/tests/unit/test_snap.py
@@ -510,6 +510,14 @@ def test_can_run_snap_daemon_commands(self, mock_subprocess):
             capture_output=True,
         )
 
+        foo.logs(num_lines='all')
+        mock_subprocess.assert_called_with(
+            ["snap", "logs", "-n=all", "foo"],
+            text=True,
+            check=True,
+            capture_output=True,
+        )
+
         foo.logs(services=["bar", "baz"], num_lines=None)
         mock_subprocess.assert_called_with(
             ["snap", "logs", "foo.bar", "foo.baz"],