diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json
index 6f3ff020a68176f55ddedc8614bbe49dcf525ba6..b2721be11f45e8249664c7e52c71685eb67b6e4e 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json
index bacbf19a9d403d42140b02a3095c590c57100633..6edc7a8c6e8c6cd70fdc3583be27fb72f4acdc6c 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json
index 9b3f73765df54827f16148e8792277c9e312e421..9fdef92c5e778853d25d830b608a4d110260160d 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json
index ae0f957e19e4b5076252c15731d3564d4e37fb06..ea1a03f7582ebce534f0c42457b00d3643abe40d 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json
index a6b2e79e8ff0e7db54e87f024ddf39fb324d752c..137281b4e251019bd090acb8855e56b7d7a8c190 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json
index 5207f4d3cfacc5617c0de8b6b0eb6b2adc3d4635..9e6e665bd139637cdfe205b4a6dfc026c63862c0 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json
index 6ff1a5d6a6d00622be70ca8bb9e90e3334a3f871..e07983ab53623c6f0224630eaac4341238e14f90 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json
index 75e90d6a381259107a094ef2b0fbc2c798a0a485..0bcaf078e3d5c9616b6c236a7ae4b12e4549dc4a 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json
index 890eaf07b936220386c1bd5fbc0296e93c0ebd7d..bcc22dd48f9a5e000d030f7e690d432c37d6f015 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json
index f935fd833a03669a70cbcc70bb816fcbde5a406b..a8475045c02b9c6340f9179f4427ca0066052bda 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json
@@ -12,7 +12,7 @@
   "chassis": {
     "manufacturer": "Bull SAS",
     "name": "bullx",
-    "serial": 1234567890
+    "serial": "1234567890"
   },
   "gpu": {
     "gpu": true,
diff --git a/generators/input/sites/grenoble/clusters/adonis_generated.yaml b/generators/input/sites/grenoble/clusters/adonis_generated.yaml
index 9b805206f6dc98050c21378f183285d7fab2c7be..9ae1eebf6c8ae65a856011c51ecfbd891860836f 100644
--- a/generators/input/sites/grenoble/clusters/adonis_generated.yaml
+++ b/generators/input/sites/grenoble/clusters/adonis_generated.yaml
@@ -51,7 +51,7 @@ adonis-1:
       mac: 00:30:48:cc:b0:58
       ip: 172.17.18.1
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   supported_job_types:
@@ -127,7 +127,7 @@ adonis-2:
   supported_job_types:
     virtual: ivt
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   main_memory:
@@ -201,7 +201,7 @@ adonis-3:
   supported_job_types:
     virtual: ivt
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   processor:
@@ -275,7 +275,7 @@ adonis-4:
   supported_job_types:
     virtual: ivt
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   processor:
@@ -347,7 +347,7 @@ adonis-5:
     name: debian
     version: 6.0.6
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   supported_job_types:
@@ -421,7 +421,7 @@ adonis-6:
       rev: 2.0
       vendor: Western Digital
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   supported_job_types:
@@ -495,7 +495,7 @@ adonis-7:
     name: debian
     version: 6.0.6
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   supported_job_types:
@@ -569,7 +569,7 @@ adonis-8:
       mac: 00:30:48:cc:b6:6d
       ip: 172.17.18.8
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   supported_job_types:
@@ -643,7 +643,7 @@ adonis-9:
       rev: 2.0
       vendor: Western Digital
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   supported_job_types:
@@ -717,7 +717,7 @@ adonis-10:
       rev: 2.0
       vendor: Western Digital
   chassis:
-    serial_number: 1234567890
+    serial_number: "1234567890"
     manufacturer: Bull SAS
     product_name: bullx
   supported_job_types: