diff --git a/data/grid5000/sites/lille/servers/fives.json b/data/grid5000/sites/lille/servers/fives.json
index 3e749439f22c00265ff99d7155e672cc4cee7848..07b9ce5503b5ae7936bf3d8a783bc17098fa2b22 100644
--- a/data/grid5000/sites/lille/servers/fives.json
+++ b/data/grid5000/sites/lille/servers/fives.json
@@ -47,7 +47,7 @@
       }
     }
   },
-  "serial": "C",
+  "serial": "CQ9WD5J",
   "type": "server",
   "uid": "fives",
   "warranty": "28.07.2017"
diff --git a/grid5000-all.json b/grid5000-all.json
index c321947f146a54a56cfc1486b2f867a0d156d826..9d4112cda2a2bf190ce26544253ce8f0d0b78f94 100644
--- a/grid5000-all.json
+++ b/grid5000-all.json
@@ -28178,7 +28178,7 @@
               }
             }
           },
-          "serial": "C",
+          "serial": "CQ9WD5J",
           "type": "server",
           "uid": "fives",
           "warranty": "28.07.2017"
diff --git a/input/grid5000/sites/lille/servers/physical.yaml b/input/grid5000/sites/lille/servers/physical.yaml
index e099bf541c44390459a6ecfaa338d37e4b846183..ff3fc632d212ec6ab61a9efed940cc2ec7ce6e88 100644
--- a/input/grid5000/sites/lille/servers/physical.yaml
+++ b/input/grid5000/sites/lille/servers/physical.yaml
@@ -4,7 +4,7 @@ fives:
     - adminfront
     - af
   warranty: 28.07.2017
-  serial: C
+  serial: CQ9WD5J
   network_adapters:
     default:
       mounted: true