diff --git a/lib/python/base_cli/history.py b/lib/python/base_cli/history.py
index 675b697..04ccd2e 100644
--- a/lib/python/base_cli/history.py
+++ b/lib/python/base_cli/history.py
@@ -262,7 +262,7 @@ def display_command(cli_name: str, argv: list[str]) -> str:
 
 
 def parse_positive_int(option: str, value: str) -> int:
-    if not value.isdigit():
+    if not value.isdecimal():
         raise ValueError(f"Option '{option}' must be a positive integer.")
     amount = int(value)
     if amount <= 0:
diff --git a/tests/test_history.py b/tests/test_history.py
index 7a2863f..0289642 100644
--- a/tests/test_history.py
+++ b/tests/test_history.py
@@ -58,6 +58,15 @@ def test_msvcrt_backend_uses_a_private_sidecar_lock(self) -> None:
 
         self.assertEqual(fake_msvcrt.calls, [(_FakeMsvcrt.LK_LOCK, 1), (_FakeMsvcrt.LK_UNLCK, 1)])
 
+
+class PositiveIntegerTests(unittest.TestCase):
+    def test_parse_positive_int_rejects_digit_like_non_decimal_characters(self) -> None:
+        with self.assertRaisesRegex(ValueError, "Option '--limit' must be a positive integer"):
+            history.parse_positive_int("--limit", "²")
+
+    def test_parse_positive_int_accepts_decimal_digits(self) -> None:
+        self.assertEqual(history.parse_positive_int("--limit", "١٢"), 12)
+
     def test_msvcrt_sidecar_initialization_race_is_tolerated(self) -> None:
         fake_msvcrt = _FakeMsvcrt()
         original_write = history.os.write