diff --git a/data/grid5000/sites/sophia/clusters/esterel10/esterel10.json b/data/grid5000/sites/sophia/clusters/esterel10/esterel10.json
index 080ce187180de91e2411141a0f827dc3de39683b..aa8994b0355987cbeafb5e447fa2b8266605b64e 100644
--- a/data/grid5000/sites/sophia/clusters/esterel10/esterel10.json
+++ b/data/grid5000/sites/sophia/clusters/esterel10/esterel10.json
@@ -1,5 +1,5 @@
 {
-  "boot_type": "uefi",
+  "boot_type": "bios",
   "created_at": "Thu, 19 Dec 2024 00:00:00 GMT",
   "exotic": false,
   "kavlan": false,
diff --git a/input/grid5000/sites/sophia/clusters/esterel10/esterel10.yaml b/input/grid5000/sites/sophia/clusters/esterel10/esterel10.yaml
index 9447b9a57caf4b93106451f4298d11406097a6bb..2a2e070d51387d685e9c86a63f16ba0a495ab890 100644
--- a/input/grid5000/sites/sophia/clusters/esterel10/esterel10.yaml
+++ b/input/grid5000/sites/sophia/clusters/esterel10/esterel10.yaml
@@ -2,7 +2,7 @@
 model: Dell T630
 created_at: 2024-12-19
 kavlan: false
-boot_type: uefi
+boot_type: bios
 exotic: false
 queues:
   - admin