diff --git a/composer.json b/composer.json
index 1fde0ac..d9351d2 100644
--- a/composer.json
+++ b/composer.json
@@ -20,9 +20,9 @@
     },
     "require": {
         "php": ">=7.2.5",
-        "illuminate/console": "5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0",
-        "illuminate/http": "5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0",
-        "illuminate/support": "5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0",
+        "illuminate/console": "5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
+        "illuminate/http": "5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
+        "illuminate/support": "5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
         "symfony/var-dumper": "^5.0|^6.0|^7.0"
     },
     "require-dev": {
diff --git a/src/Dumper.php b/src/Dumper.php
index 4e6ab7b..5e6dfeb 100755
--- a/src/Dumper.php
+++ b/src/Dumper.php
@@ -22,7 +22,7 @@ class Dumper
      * @param  \Symfony\Component\VarDumper\Server\Connection|null  $connection
      * @return void
      */
-    public function __construct(Connection $connection = null)
+    public function __construct(?Connection $connection = null)
     {
         $this->connection = $connection;
     }
diff --git a/src/RequestContextProvider.php b/src/RequestContextProvider.php
index 115a72a..dc165f8 100644
--- a/src/RequestContextProvider.php
+++ b/src/RequestContextProvider.php
@@ -28,7 +28,7 @@ class RequestContextProvider implements ContextProviderInterface
      * @param  \Illuminate\Http\Request|null  $currentRequest
      * @return void
      */
-    public function __construct(Request $currentRequest = null)
+    public function __construct(?Request $currentRequest = null)
     {
         $this->currentRequest = $currentRequest;
         $this->cloner = new VarCloner;