diff --git a/.forgejo/workflows/graph-updater.yml b/.forgejo/workflows/graph-updater.yml
index b1f368d..efea9db 100644
--- a/.forgejo/workflows/graph-updater.yml
+++ b/.forgejo/workflows/graph-updater.yml
@@ -3,19 +3,26 @@ name: Updates the graph by copying the updated files in the rigth directory
 on:
   push:
     branches:
-      - main   
+      - main
 
 jobs:
   build-and-deploy:
     runs-on: usainbolt
     steps:
-
       # 1. Checkout del codice (scarica la repo usando checkout@v4: un insieme di comandi prefatto)
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      # 1. Validazione del JSON
+      - name: Validate arf.json (the file with the content of the graph)
+        run: |
+          if ! jq empty public/arf.json; then
+            echo "❌ arf.json non è un JSON valido"
+            exit 1
+          fi
+        shell: bash
+
       # 2. Copia dei files da public in var/www/...
-      - name: 
+      - name: File copy to update web page
         run: |
           cp -r public/* /var/www/miniera.hackinpovo.it/html/
-