diff --git a/composer.json b/composer.json
index 56a0d85..3d96a63 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     "require": {
         "php": ">=7.0.0",
         "laravel/framework": "~5.5",
-        "encore/laravel-admin": "1.5.*"
+        "encore/laravel-admin": "~1.5"
     },
     "require-dev": {
         "phpunit/phpunit": "~6.0",
diff --git a/src/LogController.php b/src/LogController.php
index fc78b7d..3f6e925 100644
--- a/src/LogController.php
+++ b/src/LogController.php
@@ -9,8 +9,12 @@
 
 class LogController extends Controller
 {
-    public function index($file, Request $request)
+    public function index($file = null, Request $request)
     {
+        if ($file === null) {
+            $file = (new LogViewer())->getLastModifiedLog();
+        }
+
         return Admin::content(function (Content $content) use ($file, $request) {
             $offset = $request->get('offset');