diff --git a/src/mine.py b/src/mine.py
index cf2913a..d317a41 100644
--- a/src/mine.py
+++ b/src/mine.py
@@ -1,3 +1,3 @@
 class Mine:
-    def __init__(self, is_armed: bool):
+    def __init__(self, is_armed: bool = True):
         self.is_armed = is_armed