diff --git a/.gitea/workflows/vulnscan.yaml b/.gitea/workflows/vulnscan.yaml
index 56391f1..a357756 100644
--- a/.gitea/workflows/vulnscan.yaml
+++ b/.gitea/workflows/vulnscan.yaml
@@ -1,3 +1,4 @@
+---
 name: Vulnerability Scan
 
 on:
@@ -16,14 +17,42 @@ jobs:
       - name: Pull docker image
         run: docker pull docker.asperti.com/paspo/glpi:latest
 
+      - uses: actions/cache/restore@v4
+        with:
+          path: |
+            /root/.cache/trivy
+          key: trivy-db
+
+      - name: Setup trivy
+        run: |
+          wget -O /tmp/trivy.deb https://github.com/aquasecurity/trivy/releases/download/v0.57.1/trivy_0.57.1_Linux-64bit.deb
+          dpkg -i /tmp/trivy.deb
+
       - name: Run Trivy vulnerability scanner
         id: scan
-        uses: aquasecurity/trivy-action@master
+        run: |
+          trivy image --format json docker.asperti.com/paspo/glpi:latest > trivy-results.json
+
+      - uses: actions/cache/save@v4
+        if: always()  # salva in cache anche se trova vulnerabilità
         with:
-          image-ref: "docker.asperti.com/paspo/glpi:latest"
-          format: "json"
-          output: "trivy-results.json"
+          path: |
+            /root/.cache/trivy
+          key: trivy-db
 
       # if some vulnerability is found, we fail
       - name: check output
-        run: if [ $(jq '.Results[0].Vulnerabilities|length' trivy-results.json) -ne "0" ] ; then exit 1 ; fi
+        id: vulncount
+        run: |
+          echo "VULNCOUNT=$(jq '.Results[0].Vulnerabilities|length' trivy-results.json)" >> ${GITHUB_OUTPUT}
+          if [ $(jq '.Results[0].Vulnerabilities|length' trivy-results.json) -ne "0" ] ; then exit 1 ; fi
+
+      - name: send telegram notification
+        if: failure()
+        uses: appleboy/telegram-action@master
+        with:
+          to: ${{ secrets.TELEGRAM_TO }}
+          token: ${{ secrets.TELEGRAM_TOKEN }}
+          format: markdown
+          message: |
+            Found **${{ steps.vulncount.outputs.VULNCOUNT }}** vulnerabilities in `${{ github.repository }}`