diff --git a/.env.development b/.env.development
index 5ea6aff..3bd0317 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.510
+NEXT_PUBLIC_APP_VERSION=1.6.511
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index 276ffe3..3924c8f 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.510
+NEXT_PUBLIC_APP_VERSION=1.6.511
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..c0c80ba
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+engine-strict=false
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 073597a..413111f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [1.6.511] – 2025-07-01
+
+- feat: alle KÜs Firmware update
+
+---
 ## [1.6.510] – 2025-06-30
 
 - feat: handleKueFirmwareUpdate
diff --git a/components/main/kabelueberwachung/kue705FO/handlers/firmwareUpdate.ts b/components/main/kabelueberwachung/kue705FO/handlers/firmwareUpdate.ts
index fc76215..b922304 100644
--- a/components/main/kabelueberwachung/kue705FO/handlers/firmwareUpdate.ts
+++ b/components/main/kabelueberwachung/kue705FO/handlers/firmwareUpdate.ts
@@ -1,16 +1,24 @@
+// /komponents/main/kabelueberwachung/kue705FO/handlers/firmwareUpdate.ts
 const firmwareUpdate = (slot: number) => {
-  const url = `${window.location.origin}/CPL?/kabelueberwachung.html&KSU${slot}=1`;
+  const isDev =
+    typeof window !== "undefined" && window.location.hostname === "localhost";
+  const url = isDev
+    ? `${window.location.origin}/api/cpl/kueSingleModuleUpdateMock?slot=${
+        slot + 1
+      }`
+    : `${window.location.origin}/CPL?/kabelueberwachung.html&KSU${slot}=1`;
+
   fetch(url, { method: "GET" })
-    .then((response) => {
-      if (response.ok) {
-        alert(`Update an ${slot + 1} erfolgreich gestartet!`);
-      } else {
-        alert("Fehler beim Update!");
-      }
+    .then((response) => response.json())
+    .then((data) => {
+      alert(
+        data.message || `Update an Slot ${slot + 1} erfolgreich gestartet!`
+      );
     })
     .catch((error) => {
       console.error("Fehler:", error);
       alert("Fehler beim Update!");
     });
 };
+
 export default firmwareUpdate;
diff --git a/components/main/kabelueberwachung/kue705FO/modals/KueEinstellung.tsx b/components/main/kabelueberwachung/kue705FO/modals/KueEinstellung.tsx
index e237b91..b5a03f2 100644
--- a/components/main/kabelueberwachung/kue705FO/modals/KueEinstellung.tsx
+++ b/components/main/kabelueberwachung/kue705FO/modals/KueEinstellung.tsx
@@ -246,7 +246,15 @@ export default function KueEinstellung({
       <div className="flex justify-end gap-2  p-0 rounded">
         {isAdminLoggedIn && (
           <button
-            onClick={() => firmwareUpdate(slot)}
+            onClick={() => {
+              if (
+                window.confirm(
+                  "Warnung: Das Firmware-Update kann einige Minuten dauern und das Gerät neu starten.\nMöchten Sie wirklich fortfahren?"
+                )
+              ) {
+                firmwareUpdate(slot);
+              }
+            }}
             className="bg-littwin-blue text-white px-4 py-2 rounded flex items-center"
           >
             Firmware Update
diff --git a/components/main/settingsPageComponents/GeneralSettings.tsx b/components/main/settingsPageComponents/GeneralSettings.tsx
index 406d9df..d6a17a1 100644
--- a/components/main/settingsPageComponents/GeneralSettings.tsx
+++ b/components/main/settingsPageComponents/GeneralSettings.tsx
@@ -12,15 +12,15 @@ import { AppDispatch } from "../../../redux/store";
 import { getSystemSettingsThunk } from "../../../redux/thunks/getSystemSettingsThunk";
 import handleGeneralSubmit from "./handlers/handleGeneralSubmit";
 import handleKueFirmwareUpdate from "@/components/main/settingsPageComponents/handlers/handleKueFirmwareUpdate";
+import { useAdminAuth } from "@/components/main/settingsPageComponents/hooks/useAdminAuth";
 
 const GeneralSettings: React.FC = () => {
   const dispatch = useDispatch<AppDispatch>();
   const systemSettings = useSelector(
     (state: RootState) => state.systemSettingsSlice
   );
-  const isAdmin = useSelector(
-    (state: RootState) => state.authSlice?.isAdminLoggedIn
-  );
+
+  const { isAdminLoggedIn } = useAdminAuth(true);
 
   // const [error, setError] = useState("");
 
@@ -196,10 +196,10 @@ const GeneralSettings: React.FC = () => {
           >
             Neustart CPL
           </button>
-          {isAdmin && (
+          {isAdminLoggedIn && (
             <button
               type="button"
-              className="bg-red-600 text-white px-4 py-2 h-8 text-xs rounded whitespace-nowrap"
+              className="bg-littwin-blue text-white px-4 py-2 h-8 text-xs rounded whitespace-nowrap"
               onClick={handleKueFirmwareUpdate}
             >
               Firmwareupdate alle KÜ-Module
diff --git a/mocks/device-cgi-simulator/firmwareUpdate/singleModuleUpdateResponse.json b/mocks/device-cgi-simulator/firmwareUpdate/singleModuleUpdateResponse.json
new file mode 100644
index 0000000..1ab0608
--- /dev/null
+++ b/mocks/device-cgi-simulator/firmwareUpdate/singleModuleUpdateResponse.json
@@ -0,0 +1,4 @@
+{
+  "success": true,
+  "message": "Update erfolgreich gestartet für Slot X"
+}
diff --git a/package-lock.json b/package-lock.json
index 57a35ed..0397db8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.510",
+  "version": "1.6.511",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.510",
+      "version": "1.6.511",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@iconify-icons/ri": "^1.2.10",
diff --git a/package.json b/package.json
index cb5d1fd..0d2eae6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.510",
+  "version": "1.6.511",
   "private": true,
   "scripts": {
     "dev": "next dev",
diff --git a/pages/api/cpl/kueSingleModuleUpdateMock.ts b/pages/api/cpl/kueSingleModuleUpdateMock.ts
new file mode 100644
index 0000000..f56711f
--- /dev/null
+++ b/pages/api/cpl/kueSingleModuleUpdateMock.ts
@@ -0,0 +1,25 @@
+// /pages/api/cpl/kueSingleModuleUpdateMock.ts
+import type { NextApiRequest, NextApiResponse } from "next";
+import fs from "fs";
+import path from "path";
+
+export default function handler(req: NextApiRequest, res: NextApiResponse) {
+  const filePath = path.join(
+    process.cwd(),
+    "mocks/device-cgi-simulator/firmwareUpdate/singleModuleUpdateResponse.json"
+  );
+
+  try {
+    const fileContents = fs.readFileSync(filePath, "utf-8");
+    const responseData = JSON.parse(fileContents);
+
+    // Optional: slot aus query übernehmen
+    const slot = req.query.slot ?? "X";
+    responseData.message = `Update erfolgreich gestartet für Slot ${slot}`;
+
+    res.status(200).json(responseData);
+  } catch (error) {
+    console.error("Fehler beim Lesen der Mock-Datei:", error);
+    res.status(500).json({ error: "Fehler beim Mock-Update" });
+  }
+}