diff --git a/input/grid5000/sites/nancy/clusters/graffiti/graffiti_ip.yaml.erb b/input/grid5000/sites/nancy/clusters/graffiti/graffiti_ip.yaml.erb
index 62a51088acd36db1d6278ecc5b323a05a0575162..8da6177543c9ba1bf5cd7dc2567b0fdac9744c21 100644
--- a/input/grid5000/sites/nancy/clusters/graffiti/graffiti_ip.yaml.erb
+++ b/input/grid5000/sites/nancy/clusters/graffiti/graffiti_ip.yaml.erb
@@ -25,8 +25,8 @@ nodes:
          mac: <%= %w(
                      F4:02:70:9A:3F:74
                      F4:02:70:9A:48:E8
-                     BF:EA:1E:60:3F:A0
-                     BF:EA:1E:60:3F:A1
+                     F4:02:70:9A:49:82
+                     F4:02:70:9A:4B:66
                      BF:EA:1E:60:3F:A2
                      BF:EA:1E:60:3F:A3
                      BF:EA:1E:60:3F:A4