diff --git a/composer.json b/composer.json
index c9b5dbd..f1b6562 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
     ],
     "homepage": "https://github.com/smoothphp/laravel-request-logger",
     "require": {
-        "php": ">=7.0",
+        "php": ">=7.1",
         "illuminate/bus": "^5.3",
         "illuminate/routing": "^5.3",
         "illuminate/queue": "^5.3",
diff --git a/src/Job/LogRequests.php b/src/Job/LogRequests.php
index 28b2b48..7df5485 100644
--- a/src/Job/LogRequests.php
+++ b/src/Job/LogRequests.php
@@ -22,7 +22,7 @@ final class LogRequests implements ShouldQueue
      * @param Store  $store
      * @return void
      */
-    public function handle(Router $router, Store $store)
+    public function handle(Router $router, Store $store) : void
     {
         $route   = $router->getCurrentRoute();
         $request = $router->getCurrentRequest();
@@ -42,4 +42,4 @@ public function handle(Router $router, Store $store)
 
         $this->delete();
     }
-}
\ No newline at end of file
+}
diff --git a/src/Request/Adapter/DataStoreAdapter.php b/src/Request/Adapter/DataStoreAdapter.php
index c094b6f..7eea369 100644
--- a/src/Request/Adapter/DataStoreAdapter.php
+++ b/src/Request/Adapter/DataStoreAdapter.php
@@ -14,5 +14,5 @@ interface DataStoreAdapter
      * @param array $data
      * @return void
      */
-    public function store(string $ip, array $data);
-}
\ No newline at end of file
+    public function store(string $ip, array $data) : void;
+}
diff --git a/src/Request/Adapter/FilesystemAdapter.php b/src/Request/Adapter/FilesystemAdapter.php
index f2cbaf8..4225981 100644
--- a/src/Request/Adapter/FilesystemAdapter.php
+++ b/src/Request/Adapter/FilesystemAdapter.php
@@ -14,6 +14,7 @@ final class FilesystemAdapter implements DataStoreAdapter
 {
     /** @var Filesystem */
     private $filesystem;
+
     /** @var string */
     private $filenameFormat;
 
@@ -32,11 +33,11 @@ public function __construct(Filesystem $filesystem, string $filenameFormat)
      * @param array $data
      * @return void
      */
-    public function store(string $ip, array $data)
+    public function store(string $ip, array $data) : void
     {
         $this->filesystem->put(vsprintf('%s/%s.json', [
             $ip,
             (new DateTime)->format($this->filenameFormat)
         ]), json_encode($data));
     }
-}
\ No newline at end of file
+}
diff --git a/src/Request/Adapter/MongoAdapter.php b/src/Request/Adapter/MongoAdapter.php
index 4a426bb..1bff1da 100644
--- a/src/Request/Adapter/MongoAdapter.php
+++ b/src/Request/Adapter/MongoAdapter.php
@@ -31,9 +31,9 @@ public function __construct(Connection $connection, string $collection)
      * @param array $data
      * @return void
      */
-    public function store(string $ip, array $data)
+    public function store(string $ip, array $data) : void
     {
         $data['ip'] = $ip;
         $this->connection->collection($this->collection)->insert([$data]);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Request/RequestStore.php b/src/Request/RequestStore.php
index d9fc34a..92ab59c 100644
--- a/src/Request/RequestStore.php
+++ b/src/Request/RequestStore.php
@@ -27,8 +27,8 @@ public function __construct(Adapter\DataStoreAdapter $adapter)
      * @param array $data
      * @return void
      */
-    public function log(string $ip, array $data)
+    public function log(string $ip, array $data) : void
     {
         $this->adapter->store($ip, $data);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Request/Store.php b/src/Request/Store.php
index 9c37046..3dffc0c 100644
--- a/src/Request/Store.php
+++ b/src/Request/Store.php
@@ -14,5 +14,5 @@ interface Store
      * @param array $data
      * @return void
      */
-    public function log(string $ip, array $data);
-}
\ No newline at end of file
+    public function log(string $ip, array $data) : void;
+}
diff --git a/src/RequestLoggerServiceProvider.php b/src/RequestLoggerServiceProvider.php
index 0e28256..47168ba 100644
--- a/src/RequestLoggerServiceProvider.php
+++ b/src/RequestLoggerServiceProvider.php
@@ -23,7 +23,7 @@ final class RequestLoggerServiceProvider extends ServiceProvider
     /**
      * Boot
      */
-    public function boot()
+    public function boot() : void
     {
         $this->publishes(
             [
@@ -35,7 +35,7 @@ public function boot()
     /**
      * Register
      */
-    public function register()
+    public function register() : void
     {
         $app = $this->app;
 
@@ -63,7 +63,7 @@ public function register()
     /**
      * @return array
      */
-    public function provides()
+    public function provides() : array
     {
         return [
             DataStoreAdapter::class,
@@ -73,4 +73,4 @@ public function provides()
             Store::class,
         ];
     }
-}
\ No newline at end of file
+}