diff --git a/app/Http/Controllers/LicenseController.php b/app/Http/Controllers/LicenseController.php
index 6ef7ebb..a897556 100644
--- a/app/Http/Controllers/LicenseController.php
+++ b/app/Http/Controllers/LicenseController.php
@@ -21,7 +21,13 @@ class LicenseController extends Controller
     public function index()
     {
         $licenses = License::orderBy('expirationDate', 'asc')->get();
-        return ApiDataTransformer::snakeToCamel($licenses->toArray());
+
+        return array_map(function (License $license) {
+            $licenseData = ApiDataTransformer::snakeToCamel($license->toArray());
+            $licenseData['validationInfo'] = $this->buildValidationInfo($licenseData);
+
+            return $licenseData;
+        }, $licenses->all());
     }
 
     /**
@@ -35,7 +41,10 @@ public function index()
     public function single($id)
     {
         $license = License::findOrFail($id);
-        return ApiDataTransformer::snakeToCamel($license->toArray());
+        $licenseData = ApiDataTransformer::snakeToCamel($license->toArray());
+        $licenseData['validationInfo'] = $this->buildValidationInfo($licenseData);
+
+        return $licenseData;
     }
 
     /**
@@ -103,7 +112,8 @@ protected function getApplicationKeyPair(): array
     /**
      * Generate a signature for the license data.
      *
-     * Uses the private key to sign the data.
+     * The payload is signed in camelCase because the signature is consumed by PHP-side
+     * validation logic and is not persisted as a database column shape.
      *
      * @param array $licenseData The license data to sign
      * @param string $privateKey The private key to use for signing
@@ -130,7 +140,7 @@ protected function sign($licenseData, $privateKey)
      */
     public function store(Request $request)
     {
-        // Validate the request data
+        // Validate the request data coming from the frontend in camelCase.
         $validatedData = $request->validate([
             'name' => 'required|string',
             'email' => 'required|email',
@@ -140,22 +150,24 @@ public function store(Request $request)
             'expirationDate' => 'nullable|date',
         ]);
 
-        // Convert camelCase to snake_case
-        $snakeCaseData = ApiDataTransformer::camelToSnake($validatedData);
-
 
         $keyPair = $this->getApplicationKeyPair();
 
-        $licenseData = [
-            'name' => $snakeCaseData['name'],
-            'email' => $snakeCaseData['email'],
-            'product' => $snakeCaseData['product'],
-            'version' => $snakeCaseData['version'],
-            'is_perpetual' => $snakeCaseData['is_perpetual'],
-            'expiration_date' => $snakeCaseData['expiration_date'],
+        // Sign the camelCase business payload. The signature is validated by PHP code,
+        // not persisted as part of the database column schema.
+        $signatureData = [
+            'name' => $validatedData['name'],
+            'email' => $validatedData['email'],
+            'product' => $validatedData['product'],
+            'version' => $validatedData['version'],
+            'isPerpetual' => $validatedData['isPerpetual'],
+            'expirationDate' => $validatedData['isPerpetual'] ? null : $validatedData['expirationDate'],
         ];
 
-        $signature = $this->sign($licenseData, $keyPair['privateKey']);
+        $signature = $this->sign($signatureData, $keyPair['privateKey']);
+
+        // Convert incoming camelCase fields to snake_case only for database storage.
+        $snakeCaseData = ApiDataTransformer::camelToSnake($validatedData);
 
         $license = License::create([
             'name' => $snakeCaseData['name'],
@@ -179,6 +191,8 @@ public function store(Request $request)
      */
     public function validate(Request $request)
     {
+        // The frontend sends camelCase, and the signature is verified against the same
+        // camelCase representation. We keep snake_case only for database persistence.
         $validatedData = $request->validate([
             'name' => 'required|string',
             'email' => 'required|email',
@@ -189,42 +203,45 @@ public function validate(Request $request)
             'signature' => 'required|string',
         ]);
 
-        return $this->isValid(ApiDataTransformer::camelToSnake($validatedData));
+        return $this->buildValidationInfo($validatedData);
     }
 
 
     /**
-     * Validate the license signature and expiration date.
+     * Build the validation info for a license payload.
      *
-     * The validation logic should be portable to other languages.
+     * A license is considered valid when:
+     * - the signature is valid, and
+     * - the license is perpetual, or the expiration date is still in the future.
      *
      * @param array $licenseData The license data to validate
      * @return array
      */
-    protected function isValid(array $licenseData)
+    protected function buildValidationInfo(array $licenseData): array
     {
-        
         $publicKey = Storage::disk('local')->get($this->publicKeyPath());
-        
-        
-        // Convert the license data to JSON
-        $licenseJson = json_encode($licenseData);
-        
-               
-        // Verify the signature
-        $signature = base64_decode($licenseData['signature']);
-        $isSignatureValid = openssl_verify($licenseJson, $signature, $publicKey, OPENSSL_ALGO_SHA256);
 
-        // Check the expiration date if the license is not perpetual
-        $isExpired = false;
-        if (!$licenseData['is_perpetual'] && $licenseData['expiration_date']) {
-            $isExpired = now()->gt($licenseData['expiration_date']);
-        }
+        $licenseData = ApiDataTransformer::snakeToCamel($licenseData);
+        $isPerpetual = (bool) ($licenseData['isPerpetual'] ?? false);
+        $expirationDate = $licenseData['expirationDate'] ?? null;
+
+        // Validate against the same camelCase payload shape used to generate the signature.
+        $licenseJson = json_encode([
+            'name' => $licenseData['name'] ?? '',
+            'email' => $licenseData['email'] ?? '',
+            'product' => $licenseData['product'] ?? '',
+            'version' => $licenseData['version'] ?? '',
+            'isPerpetual' => $isPerpetual,
+            'expirationDate' => $expirationDate,
+        ]);
+
+        $signature = base64_decode($licenseData['signature'] ?? '', true);
+        $isSignatureValid = $signature !== false && openssl_verify($licenseJson, $signature, $publicKey, OPENSSL_ALGO_SHA256) === 1;
+        $isExpired = !$isPerpetual && !empty($expirationDate) && now()->gt($expirationDate);
 
-        // Return the validation info
         return [
-            'isValid' => $isSignatureValid === 1 && !$isExpired,
-            'isSignatureValid' => $isSignatureValid === 1,
+            'isValid' => $isSignatureValid && !$isExpired,
+            'isSignatureValid' => $isSignatureValid,
             'isExpired' => $isExpired,
         ];
     }
@@ -247,12 +264,12 @@ public function download(int $id)
             'product' => $license->product,
             'version' => $license->version,
             'is_perpetual' => $license->is_perpetual,
-            'expiration_date' => $license->expiration_date,
+            'expiration_date' => $license->expiration_date?->format('Y-m-d'),
             'signature' => $license->signature,
         ];
 
-        // Convert the license data to JSON
-        $licenseJson = json_encode($licenseData, JSON_PRETTY_PRINT);
+        // Normalize the outgoing payload to camelCase for the frontend consumer.
+        $licenseJson = json_encode(ApiDataTransformer::snakeToCamel($licenseData), JSON_PRETTY_PRINT);
 
         // Create a response with the JSON file
         $response = response($licenseJson, 200, [
@@ -263,6 +280,91 @@ public function download(int $id)
         return $response;
     }
 
+    /**
+     * Persist a single license update using the shared business logic.
+     *
+     * @param array $data The validated license payload in camelCase
+     * @param int $id The license id
+     * @param string $privateKey The application private key used to sign the payload
+     * @return array
+     */
+    protected function persistLicenseUpdate(array $data, int $id, string $privateKey): array
+    {
+        $data['expirationDate'] = $data['isPerpetual'] ? null : $data['expirationDate'];
+        
+        $signatureData = [
+            'name' => $data['name'],
+            'email' => $data['email'],
+            'product' => $data['product'],
+            'version' => $data['version'],
+            'isPerpetual' => $data['isPerpetual'],
+            'expirationDate' => $data['expirationDate'],
+        ];
+
+        $signature = $this->sign($signatureData, $privateKey);
+        $snakeCaseData = ApiDataTransformer::camelToSnake($data);
+
+        $license = License::findOrFail($id);
+        $license->update([
+            'name' => $snakeCaseData['name'],
+            'email' => $snakeCaseData['email'],
+            'product' => $snakeCaseData['product'],
+            'version' => $snakeCaseData['version'],
+            'is_perpetual' => $snakeCaseData['is_perpetual'],
+            'expiration_date' => $snakeCaseData['expiration_date'],
+            'signature' => $signature,
+        ]);
+
+        $licenseData = ApiDataTransformer::snakeToCamel($license->fresh()->toArray());
+        $licenseData['validationInfo'] = $this->buildValidationInfo($licenseData);
+
+        return $licenseData;
+    }
+
+    /**
+     * Update multiple licenses in a single request.
+     *
+     * This keeps the database writes in one HTTP request and avoids SQLite lock contention
+     * that can happen when a page sends one update request per dirty license in parallel.
+     *
+     * @param \Illuminate\Http\Request $request The HTTP request containing multiple updated license records
+     * @return array|\Illuminate\Http\JsonResponse
+     */
+    public function updateMany(Request $request)
+    {
+        $validatedData = $request->validate([
+            '*.id' => 'required|integer',
+            '*.name' => 'required|string',
+            '*.email' => 'required|email',
+            '*.product' => 'required|string',
+            '*.version' => 'required|string',
+            '*.isPerpetual' => 'required|boolean',
+            '*.expirationDate' => 'nullable|date',
+        ]);
+
+        $privateKey = $this->getApplicationKeyPair()['privateKey'];
+
+        DB::beginTransaction();
+
+        try {
+            $updatedLicenses = [];
+
+            foreach ($validatedData as $licensePayload) {
+                $updatedLicenses[] = $this->persistLicenseUpdate($licensePayload, $licensePayload['id'], $privateKey);
+            }
+
+            DB::commit();
+
+            return $updatedLicenses;
+        } catch (\Exception $e) {
+            DB::rollBack();
+            return response()->json([
+                'message' => 'Lizenzen konnten nicht aktualisiert werden',
+                'error' => $e->getMessage()
+            ], 500);
+        }
+    }
+
     /**
      * Update the specified resource in storage.
      *
@@ -274,7 +376,7 @@ public function download(int $id)
      */
     public function update(Request $request, int $id)
     {
-        // Validate the request data
+        // Validate the request data coming from the frontend in camelCase.
         $validatedData = $request->validate([
             'name' => 'required|string',
             'email' => 'required|email',
@@ -284,46 +386,16 @@ public function update(Request $request, int $id)
             'expirationDate' => 'nullable|date',
         ]);
 
-        // Convert camelCase to snake_case
-        $snakeCaseData = ApiDataTransformer::camelToSnake($validatedData);
-
         DB::beginTransaction();
 
         try {
-            // Find license
-            $license = License::findOrFail($id);
-
-            // Retrieve the private key for the license
             $privateKey = $this->getApplicationKeyPair()['privateKey'];
-
-            // Generate the license data
-            $licenseData = [
-                'name' => $snakeCaseData['name'],
-                'email' => $snakeCaseData['email'],
-                'product' => $snakeCaseData['product'],
-                'version' => $snakeCaseData['version'],
-                'is_perpetual' => $snakeCaseData['is_perpetual'],
-                'expiration_date' => $snakeCaseData['expiration_date'],
-            ];
-
-            // Generate the signature
-            $signature = $this->sign($licenseData, $privateKey);
-
-            // Update the license
-            $license->update([
-                'name' => $snakeCaseData['name'],
-                'email' => $snakeCaseData['email'],
-                'product' => $snakeCaseData['product'],
-                'version' => $snakeCaseData['version'],
-                'is_perpetual' => $snakeCaseData['is_perpetual'],
-                'expiration_date' => $snakeCaseData['expiration_date'],
-                'signature' => $signature,
-            ]);
+            $licenseData = $this->persistLicenseUpdate($validatedData, $id, $privateKey);
 
             DB::commit();
 
-            // Return the updated license
-            return ApiDataTransformer::snakeToCamel($license->toArray());
+            // Return the updated license with its validation info attached.
+            return $licenseData;
         } catch (\Exception $e) {
             DB::rollBack();
             return response()->json([
diff --git a/database/migrations/2026_05_25_142250_create_licenses_table.php b/database/migrations/2026_05_25_142250_create_licenses_table.php
index ed28ffa..cd77134 100644
--- a/database/migrations/2026_05_25_142250_create_licenses_table.php
+++ b/database/migrations/2026_05_25_142250_create_licenses_table.php
@@ -18,7 +18,7 @@ public function up(): void
             $table->string('product');
             $table->string('version');
             $table->boolean('is_perpetual');
-            $table->string('expiration_date')->nullable();;
+            $table->string('expiration_date')->nullable();
             $table->string('signature');
             $table->timestamps();
         });
diff --git a/resources/js/pages/Licenses.vue b/resources/js/pages/Licenses.vue
index 2918aee..f6251e3 100644
--- a/resources/js/pages/Licenses.vue
+++ b/resources/js/pages/Licenses.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { License } from '@/types'
 import { newLicense } from '@/types/index.d'
-import { toLocalDate, toShortISOString, hotkey } from '@/lib/utils'
+import { hotkey, toShortISOString } from '@/lib/utils'
 import Fuse from 'fuse.js'
 import { onMounted, ref, computed } from 'vue'
 import AppLayout from '@/layouts/AppLayout.vue'
@@ -13,52 +13,93 @@ import Button from '@/components/ui/crm-button/Button.vue'
 import { ButtonGroup } from '@/components/ui/button-group'
 import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip'
 import { Kbd, KbdGroup } from '@/components/ui/kbd'
-import LicenseService from '@/services/LicenseService';
-import { Download, Trash2, Plus, Delete, Search, CheckCircle, CheckCircle2, XCircle, CircleQuestionMark, BadgeQuestionMark, Eye } from 'lucide-vue-next'
-import { alertStore } from "@/stores/alertStore"
-import { toast } from 'vue-sonner';
+import LicenseService from '@/services/LicenseService'
+import { Download, Trash2, Plus, Delete, Search, CheckCircle2, XCircle, CircleQuestionMark, Save } from 'lucide-vue-next'
+import { alertStore } from '@/stores/alertStore'
+import { toast } from 'vue-sonner'
 
 interface Props {
     licenseData: License[]
 }
+
 const props = defineProps<Props>()
+
+// Working copy of the licenses shown in the table. All form inputs bind against this array.
 const licenses = ref([] as License[])
+// Snapshot of the initial server data used to detect whether a license has been changed.
+const originalLicenses = ref([] as License[])
+// Deep-clone the incoming license list so edits to the UI do not mutate the original props object.
+const cloneLicenses = (licenseList: License[]) => JSON.parse(JSON.stringify(licenseList)) as License[]
+
 const searchQuery = ref('')
 const searchField = ref()
 const alert = alertStore()
 
 onMounted(() => {
-    licenses.value = props.licenseData
+    licenses.value = cloneLicenses(props.licenseData)
+    originalLicenses.value = cloneLicenses(licenses.value)
     searchField.value = document.getElementById('search')
     hotkey('n', createLicense)
 })
 
 const fuse = computed(() => {
-    return new Fuse(props.licenseData, {
+    return new Fuse(licenses.value, {
         keys: ['name', 'email', 'product', 'version'],
-        threshold: 0.3
+        threshold: 0.3,
     })
 })
 
 const filteredLicenses = computed(() => {
-    let filteredLicenses = licenses.value
-    // Filter by search query
+    let filtered = licenses.value
+
     if (searchQuery.value) {
-        filteredLicenses = fuse.value.search(searchQuery.value).map(result => result.item)
+        filtered = fuse.value.search(searchQuery.value).map((result) => result.item)
     }
-    return filteredLicenses
+
+    return filtered
 })
 
+
+const isDirty = computed(() => {
+    return licenses.value.some(isLicenseDirty)
+})
+
+const isLicenseDirty = (license: License) => {
+    const originalLicense = originalLicenses.value.find((item) => item.id === license.id)
+
+    if (!originalLicense) {
+        return license.id === 0
+    }
+
+    return JSON.stringify(originalLicense) !== JSON.stringify(license)
+}
+
 const createLicense = () => {
-    LicenseService.createLicense(newLicense()).then(license => {
-        if (license) licenses.value.unshift(license)
+    LicenseService.createLicense(newLicense()).then((license) => {
+        if (license) {
+            licenses.value.unshift(license)
+            originalLicenses.value = cloneLicenses(licenses.value)
+        }
     })
 }
 
-const updateLicense = (license: License) => {
-    LicenseService.updateLicense(license).then((response) => {
-        if (response) license = response
-    })
+const updateLicenses = async () => {
+    const dirtyLicenses = licenses.value.filter(isLicenseDirty)
+
+    if (dirtyLicenses.length === 0) {
+        return
+    }
+
+    const response = await LicenseService.updateLicenses(dirtyLicenses)
+
+    if (response) {
+        response.forEach((updatedLicense) => {
+            var i = licenses.value.findIndex(license => license.id == updatedLicense.id)
+            licenses.value[i] = updatedLicense
+        })
+    }
+
+    originalLicenses.value = cloneLicenses(licenses.value)
 }
 
 const downloadLicense = (license: License) => {
@@ -66,32 +107,32 @@ const downloadLicense = (license: License) => {
 }
 
 const deleteLicense = (license: License) => {
-    if (license.id == 0) {
-        licenses.value = licenses.value.filter(l => l != license)
+    if (license.id === 0) {
+        licenses.value = licenses.value.filter((item) => item !== license)
         return
     }
 
     alert.show(
-        "Möchtest Du diese Lizenz wirklich löschen?",
+        'Möchtest Du diese Lizenz wirklich löschen?',
         null,
         {
-            actionText: "Löschen",
-            actionVariant: "destructive",
+            actionText: 'Löschen',
+            actionVariant: 'destructive',
             onAction: async () => {
                 LicenseService.deleteLicense(license.id).then(() => {
-                    licenses.value = licenses.value.filter(license => license.id != license.id)
+                    licenses.value = licenses.value.filter((item) => item.id !== license.id)
+                    originalLicenses.value = cloneLicenses(licenses.value)
                 }).catch((error) => {
                     toast.error('Fehler beim Löschen der Lizenz', { duration: 5000, description: error.message })
                 })
-            }
-        }
+            },
+        },
     )
 }
 
 const remToPx = (rem: number) => {
-    return rem * parseFloat(getComputedStyle(document.documentElement).fontSize);
+    return rem * parseFloat(getComputedStyle(document.documentElement).fontSize)
 }
-
 </script>
 
 <template>
@@ -121,19 +162,21 @@ const remToPx = (rem: number) => {
             <template #right>
                 <div class="flex gap-2 items-center">
                     <TooltipProvider>
+                        <!-- Save button -->
+                        <Button variant="action" @click="updateLicenses" v-if="isDirty">
+                            <Save /> Speichern
+                        </Button>
+
                         <!-- New button -->
                         <Tooltip>
                             <TooltipTrigger>
                                 <Button @click="createLicense">
-                                    <Plus />
-                                    Neu
+                                    <Plus /> Neu
                                 </Button>
                             </TooltipTrigger>
                             <TooltipContent>
                                 <span>Neue Lizenz anlegen</span>
-                                <KbdGroup class="ml-2">
-                                    <Kbd>N</Kbd>
-                                </KbdGroup>
+                                <KbdGroup class="ml-2"><Kbd>N</Kbd></KbdGroup>
                             </TooltipContent>
                         </Tooltip>
                     </TooltipProvider>
@@ -159,37 +202,33 @@ const remToPx = (rem: number) => {
 
                 <TableRow v-for="license in filteredLicenses" :key="license.id">
                     <TableCell class="text-center">
-                        <CircleQuestionMark class="inline-block text-muted-foreground" :size="remToPx(1)"
+                        <CircleQuestionMark class="size-5 inline-block text-muted-foreground" :size="remToPx(1)"
                             v-if="license.validationInfo === undefined" />
-                        <CheckCircle2 class="inline-block text-success0" :size="remToPx(1)"
+                        <CheckCircle2 class="size-5 inline-block text-success" :size="remToPx(1)"
                             v-else-if="license.validationInfo.isExpired === false" />
-                        <XCircle class="inline-block text-destructive0" :size="remToPx(1)" v-else />
+                        <XCircle class="size-5 inline-block text-destructive" :size="remToPx(1)" v-else />
                     </TableCell>
                     <TableCell class="text-center">
-                        <input type="checkbox" v-model="license.isPerpetual"
-                            v-on:change="updateLicense(license)" />
+                        <input type="checkbox" v-model="license.isPerpetual" />
                     </TableCell>
                     <TableCell class="whitespace-nowrap">
                         <div class="text-center" v-if="license.isPerpetual">–</div>
                         <Input v-else type="date" :modelValue="toShortISOString(license.expirationDate || new Date())"
-                            v-on:blur="updateLicense(license)" placeholder="Datum" />
+                            @update:model-value="(value) => license.expirationDate = value as string"
+                            placeholder="Datum" />
                     </TableCell>
                     <TableCell>
-                        <Input type="text" :modelValue="license.product" placeholder="Produkt Name"
-                            v-on:blur="updateLicense(license)" />
+                        <Input type="text" v-model="license.product" placeholder="Produkt Name" />
                     </TableCell>
                     <TableCell>
-                        <Input type="text" :modelValue="license.version" placeholder="1.0.0"
-                            v-on:blur="updateLicense(license)" />
+                        <Input type="text" v-model="license.version" placeholder="1.0.0" />
                     </TableCell>
 
                     <TableCell>
-                        <Input type="text" v-model="license.name" placeholder="Firma"
-                            v-on:blur="updateLicense(license)" />
+                        <Input type="text" v-model="license.name" placeholder="Firma" />
                     </TableCell>
                     <TableCell>
-                        <Input type="email" :modelValue="license.email" placeholder="E-Mail"
-                            v-on:blur="updateLicense(license)" />
+                        <Input type="email" v-model="license.email" placeholder="E-Mail" />
                     </TableCell>
 
                     <TableCell class="print:hidden">
diff --git a/resources/js/services/LicenseService.ts b/resources/js/services/LicenseService.ts
index 4f4804c..af98a40 100644
--- a/resources/js/services/LicenseService.ts
+++ b/resources/js/services/LicenseService.ts
@@ -1,5 +1,5 @@
 import axios, { AxiosError } from 'axios';
-import { License } from '@/types';
+import { License, LicenseValidationInfo } from '@/types';
 import { toast } from 'vue-sonner';
 
 const API_URL = '/api/licenses';
@@ -53,7 +53,7 @@ export default {
     },
 
     /**
-     * Updates an existing license
+     * Updates one existing license
      * @param license - The license data to update
      * @returns Promise<License | null>
      */
@@ -68,6 +68,22 @@ export default {
         }
     },
 
+    /**
+     * Updates multiple licenses in one request.
+     * @param licenses - The dirty license data to update
+     * @returns Promise<License[] | null>
+     */
+    async updateLicenses(licenses: License[]): Promise<License[] | null> {
+        try {
+            const response = await axios.put(API_URL, licenses);
+            return response.data;
+        } catch (error) {
+            toast.error('Fehler beim Aktualisieren der Lizenzen', { description: (error as AxiosError).message });
+            console.error(error);
+            return null;
+        }
+    },
+
     /**
      * Deletes a license by ID
      * @param id - The ID of the license to delete
@@ -113,9 +129,9 @@ export default {
      * @param licenseId - The ID of the license to validate
      * @returns Promise<{ is_valid: boolean, is_signature_valid: boolean, is_expired: boolean } | null>
      */
-    async validateLicense(license: License): Promise<{ isValid: boolean, isSignatureValid: boolean, isExpired: boolean } | null> {
+    async validateLicense(license: License): Promise<LicenseValidationInfo | null> {
         try {
-            const response = await axios.post('/api/licenses/validate', { license });
+            const response = await axios.post('/api/licenses/validate', license);
             return response.data;
         } catch (error) {
             toast.error('Fehler beim Validieren der Lizenz', { description: (error as AxiosError).message });
diff --git a/routes/api.php b/routes/api.php
index 2b5ae7c..3b0d8f5 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -60,6 +60,7 @@
 Route::get('/licenses/{id}', [\App\Http\Controllers\LicenseController::class, 'single']);
 Route::delete('/licenses/{id}', [\App\Http\Controllers\LicenseController::class, 'destroy']);
 Route::post('/licenses', [\App\Http\Controllers\LicenseController::class, 'store']);
+Route::put('/licenses', [\App\Http\Controllers\LicenseController::class, 'updateMany']);
 Route::put('/licenses/{id}', [\App\Http\Controllers\LicenseController::class, 'update']);
 Route::post('/licenses/validate', [\App\Http\Controllers\LicenseController::class, 'validate']);