diff --git a/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json b/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json
index 545f887e73d169ee44adfdd21386962a8bbe9bf0..90d8529cf2d43313f1c00e15f22b8a9acdca2268 100644
--- a/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json
+++ b/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json
@@ -44,7 +44,7 @@
       "ip": "172.16.131.34",
       "ip6": "2001:660:4406:800:4::22",
       "kavlan": false,
-      "mac": "50:9a:4c:6c:39:53",
+      "mac": "2c:fd:a1:34:98:4f",
       "management": false,
       "mountable": true,
       "mounted": true,
diff --git a/input/grid5000/sites/sophia/clusters/esterel27/nodes.yaml.erb b/input/grid5000/sites/sophia/clusters/esterel27/nodes.yaml.erb
index 8b3deaa1ea8d2bc5b9a320c3899e562e887f5ac5..ef38a89c5fcf469fbd5691137e2fd6d7bcdb1a6c 100644
--- a/input/grid5000/sites/sophia/clusters/esterel27/nodes.yaml.erb
+++ b/input/grid5000/sites/sophia/clusters/esterel27/nodes.yaml.erb
@@ -3,7 +3,7 @@
   nodes_number = 1
   # MAC addresses declaration
   mac_eth0_list = %w(
-    50:9a:4c:6c:39:53
+    2c:fd:a1:34:98:4f
   )
 
   # TODO: Change MAC addresses.