diff --git a/wifi/bornes.py b/wifi/bornes.py
index a94536d6..3a213960 100755
--- a/wifi/bornes.py
+++ b/wifi/bornes.py
@@ -220,7 +220,7 @@ toutes les bornes"""
         plugin = prog.split('_', 1)[0]
         if plugin == 'uptime':
             config = """graph_title Uptime Bornes
-graph_args --base 1000 --logarithmic
+graph_args --base 1000 --logarithmic -l 0.5 -u 500 -r
 graph_vlabel uptime in days"""
             def process(uptime):
                 if uptime: return str(float (uptime.split()[1]) / (24 * 3600))