diff --git a/data/grid5000/sites/nancy/pdus/gros-wattmetre1.json b/data/grid5000/sites/nancy/pdus/gros-wattmetre1.json
index 2794932372ec0d0b489408df333f176d614ccf06..249a72c680e12a8a3c3d48acf165a327214557f2 100644
--- a/data/grid5000/sites/nancy/pdus/gros-wattmetre1.json
+++ b/data/grid5000/sites/nancy/pdus/gros-wattmetre1.json
@@ -1,5 +1,5 @@
 {
-  "ip": "172.16.79.18",
+  "ip": "172.16.79.15",
   "metrics": [
     {
       "description": "Power consumption per outlet reported by wattmetre, in watt",
diff --git a/data/grid5000/sites/nancy/pdus/gros-wattmetre2.json b/data/grid5000/sites/nancy/pdus/gros-wattmetre2.json
index dcc5aba66f10b5f7cbad758eeaae799fb9abaaaf..b04e2f353790d46f3514770f373e99f0f178d62c 100644
--- a/data/grid5000/sites/nancy/pdus/gros-wattmetre2.json
+++ b/data/grid5000/sites/nancy/pdus/gros-wattmetre2.json
@@ -1,5 +1,5 @@
 {
-  "ip": "172.16.79.18",
+  "ip": "172.16.79.15",
   "metrics": [
     {
       "description": "Power consumption per outlet reported by wattmetre, in watt",
diff --git a/data/grid5000/sites/nancy/pdus/gros-wattmetre3.json b/data/grid5000/sites/nancy/pdus/gros-wattmetre3.json
index 35a5a0ecdb90cb2f864ae32bc311182225dde152..51624c483af9a26a93d4e8cc31dbf09701607462 100644
--- a/data/grid5000/sites/nancy/pdus/gros-wattmetre3.json
+++ b/data/grid5000/sites/nancy/pdus/gros-wattmetre3.json
@@ -1,5 +1,5 @@
 {
-  "ip": "172.16.79.18",
+  "ip": "172.16.79.15",
   "metrics": [
     {
       "description": "Power consumption per outlet reported by wattmetre, in watt",
diff --git a/input/grid5000/sites/nancy/pdus.yaml b/input/grid5000/sites/nancy/pdus.yaml
index 7cd338f87b1ad6f9e002bd31ff5767162cf2b56c..64d8ca65608b7d2846e89e8dc93eb522dcd540f6 100644
--- a/input/grid5000/sites/nancy/pdus.yaml
+++ b/input/grid5000/sites/nancy/pdus.yaml
@@ -222,7 +222,7 @@ pdus:
   gros-wattmetre1:
     vendor: OmegaWatt
     model: ''
-    ip: 172.16.79.18
+    ip: 172.16.79.15
     sensors:
       - power:
           resolution: 1
@@ -243,7 +243,7 @@ pdus:
   gros-wattmetre2:
     vendor: OmegaWatt
     model: ''
-    ip: 172.16.79.18
+    ip: 172.16.79.15
     sensors:
       - power:
           resolution: 1
@@ -264,7 +264,7 @@ pdus:
   gros-wattmetre3:
     vendor: OmegaWatt
     model: ''
-    ip: 172.16.79.18
+    ip: 172.16.79.15
     sensors:
       - power:
           resolution: 1