diff --git a/settings.py b/settings.py
index aa1366d..403c41f 100644
--- a/settings.py
+++ b/settings.py
@@ -17,7 +17,7 @@ class Settings():
                 self.bullet_width = 3
         self.bullet_height = 15
         self.bullet_color = 60, 60, 60
-        self.bullets_allowed = 3
+        self.bullets_allowed = 20
 
         # 外星人设置
         self.alien_speed_factor = 0.1