diff --git a/networking.nix b/networking.nix
index 310e328..a6f8360 100644
--- a/networking.nix
+++ b/networking.nix
@@ -18,12 +18,12 @@
   ## http://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/x1092.html
 
   boot.kernel.sysctl = {
-    "net.ipv6.conf.all.temp_prefered_lft" = 3600; # 1 heure
-    "net.ipv6.conf.all.temp_valid_lft" = 86400; # 1 jour
+    "net.ipv6.conf.all.temp_prefered_lft" = 1800; # 30 min
+    "net.ipv6.conf.all.temp_valid_lft" = 3600; # 1 heure
     "net.ipv6.conf.all.use_tempaddr" = 2; # activé
 
     "net.ipv6.conf.default.temp_prefered_lft" = 3600; # 1 heure
-    "net.ipv6.conf.default.temp_valid_lft" = 86400; # 1 jour
+    "net.ipv6.conf.default.temp_valid_lft" = 3600; # 1 heure
     "net.ipv6.conf.default.use_tempaddr" = 2; # activé
     };
 }