diff --git a/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json b/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json
index 5f6e859d8b8b75cb014da0d7e79b587c9d55d8d5..4b873189d277bda70b34cacb55bfc621cc7b1b31 100644
--- a/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json
+++ b/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json
@@ -310,7 +310,7 @@
     "ht_capable": true,
     "instruction_set": "x86-64",
     "microarchitecture": "Zen 3",
-    "microcode": "0xa001173",
+    "microcode": "0xa0011d1",
     "model": "AMD EPYC",
     "other_description": "AMD EPYC 7513 32-Core Processor",
     "vendor": "AMD",
diff --git a/input/grid5000/sites/nancy/clusters/grat/nodes/grat-1.yaml b/input/grid5000/sites/nancy/clusters/grat/nodes/grat-1.yaml
index 66f588e489fee685f3a7dfd4ff6db9cd4ca5c112..15fc4117c9ae33d777e6eab432d181a8de777cf6 100644
--- a/input/grid5000/sites/nancy/clusters/grat/nodes/grat-1.yaml
+++ b/input/grid5000/sites/nancy/clusters/grat/nodes/grat-1.yaml
@@ -176,7 +176,7 @@ grat-1:
     cache_l3: 33554432
     ht_capable: true
     instruction_set: x86-64
-    microcode: '0xa001173'
+    microcode: '0xa0011d1'
     model: AMD EPYC
     other_description: AMD EPYC 7513 32-Core Processor
     vendor: AMD