diff --git a/birdie.py b/birdie.py
index 14526d7..ca4d191 100644
--- a/birdie.py
+++ b/birdie.py
@@ -18,6 +18,8 @@ def on_mouse_up(): # fonction 'quand la souris ne click plus'
         titi.y += 100
         titi.speed = 5
         piou.speed = 3
+        titi.speed += 1
+        piou.speed += 1
 
 def update():
     titi.y += titi.speed # mise a jour (60x/sec) de titi