diff --git a/backend/Dockerfile b/backend/Dockerfile
index 96a6106..eafdbda 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -57,6 +57,10 @@ ENV PING_COUNT=4
 ENV GEOIP_CITY_DB=./data/GeoLite2-City.mmdb
 ENV GEOIP_ASN_DB=./data/GeoLite2-ASN.mmdb
 
+# Define build argument and environment variable for Git commit SHA
+ARG GIT_COMMIT_SHA=unknown
+ENV GIT_COMMIT_SHA=${GIT_COMMIT_SHA}
+
 
 # Run the app when the container launches
 CMD ["node", "server.js"]
\ No newline at end of file
diff --git a/backend/server.js b/backend/server.js
index 91ec06f..1ff9ffa 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -611,6 +611,14 @@ app.get('/api/lookup', async (req, res) => {
     }
 });
 
+// Version Endpunkt
+app.get('/api/version', (req, res) => {
+    const commitSha = process.env.GIT_COMMIT_SHA || 'unknown';
+    logger.info({ commitSha }, 'Version request received');
+    res.json({ commitSha });
+});
+
+
 // --- Server starten ---
 initialize().then(() => {
     app.listen(PORT, () => {
@@ -620,6 +628,7 @@ initialize().then(() => {
         logger.info(`  http://localhost:${PORT}/api/ping?targetIp=<ip>`);
         logger.info(`  http://localhost:${PORT}/api/traceroute?targetIp=<ip>`);
         logger.info(`  http://localhost:${PORT}/api/lookup?targetIp=<ip>`);
+        logger.info(`  http://localhost:${PORT}/api/version`);
     });
 }).catch(error => {
     // Fehler bei der Initialisierung wurde bereits geloggt.
diff --git a/compose.yml b/compose.yml
index 8704fd9..2c44431 100644
--- a/compose.yml
+++ b/compose.yml
@@ -1,7 +1,12 @@
 services:
   # Backend Service (Node.js App)
   backend:
-    build: ./backend # Pfad zum Verzeichnis mit dem Backend-Dockerfile
+    build:
+      context: ./backend # Pfad zum Verzeichnis mit dem Backend-Dockerfile
+      args:
+        # Übergibt den Git Commit Hash als Build-Argument.
+        # Erwartet, dass GIT_COMMIT_SHA in der Shell-Umgebung gesetzt ist (z.B. export GIT_COMMIT_SHA=$(git rev-parse --short HEAD))
+        - GIT_COMMIT_SHA=${GIT_COMMIT_SHA:-unknown}
     container_name: utools_backend # Eindeutiger Name für den Container
     restart: unless-stopped
     environment:
diff --git a/frontend/index.html b/frontend/index.html
index 308a29c..a8f8693 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -207,6 +207,12 @@
         <!-- Globaler Fehlerbereich -->
         <div id="global-error" class="mt-6 p-4 bg-red-800 text-red-100 rounded hidden"></div>
 
+        <!-- Footer für Version -->
+        <footer class="mt-8 pt-4 border-t border-gray-600 text-center text-xs text-gray-500">
+            <p>Version: <span id="commit-sha" class="font-mono">loading...</span></p>
+        </footer>
+
+
     </div>
 
     <!-- Leaflet JS -->
diff --git a/frontend/script.js b/frontend/script.js
index ecaed0d..dd58f78 100644
--- a/frontend/script.js
+++ b/frontend/script.js
@@ -66,6 +66,9 @@ document.addEventListener('DOMContentLoaded', () => {
     const tracerouteLoader = document.getElementById('traceroute-loader');
     const tracerouteMessage = document.getElementById('traceroute-message');
 
+    // --- DOM Elements (Footer) ---
+    const commitShaEl = document.getElementById('commit-sha');
+
     // --- Configuration ---
     const API_BASE_URL = '/api'; // Anpassen, falls nötig
 
@@ -260,6 +263,22 @@ document.addEventListener('DOMContentLoaded', () => {
         }
     }
 
+    /** Ruft die Versionsinformationen (Commit SHA) ab */
+    async function fetchVersionInfo() {
+        try {
+            const response = await fetch(`${API_BASE_URL}/version`);
+            if (!response.ok) throw new Error(`Network response: ${response.statusText} (${response.status})`);
+            const data = await response.json();
+            console.log('Received Version Info:', data);
+            if (commitShaEl) {
+                commitShaEl.textContent = data.commitSha || 'unknown';
+            }
+        } catch (error) {
+            console.error('Failed to fetch version info:', error);
+            if (commitShaEl) commitShaEl.textContent = 'error';
+        }
+    }
+
     // --- Lookup Functions ---
 
     /** Zeigt Fehler im Lookup-Bereich an */
@@ -562,6 +581,7 @@ document.addEventListener('DOMContentLoaded', () => {
 
     // --- Initial Load & Event Listeners ---
     fetchIpInfo(); // Lade Infos zur eigenen IP
+    fetchVersionInfo(); // Lade Versionsinfo für Footer
 
     lookupButton.addEventListener('click', handleLookupClick);
     lookupIpInput.addEventListener('keypress', (event) => {