diff --git a/app/Container/DI.php b/app/Container/DI.php
index 130d4c2..fb6c054 100644
--- a/app/Container/DI.php
+++ b/app/Container/DI.php
@@ -60,7 +60,11 @@ protected function resolve(string $class): object
             $constructorParams = [];
             foreach ($params as $param) {
                 $dependencyClass = $param->getType();
-                if ($dependencyClass instanceof \ReflectionType) {
+                if ($param->isDefaultValueAvailable()) {
+                    $constructorParams[] = $param->getDefaultValue();
+                } else if ($dependencyClass instanceof \ReflectionUnionType) {
+                    throw new ContainerException("Can't resolve entry.");
+                } else if ($dependencyClass instanceof \ReflectionType) {
                     /** @var ReflectionType $dependencyClass */
                     $type = $dependencyClass->getName();
                     if (class_exists($type)) {
diff --git a/composer.json b/composer.json
index f306f01..9b0db4e 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name": "hugoandrade/container-di",
     "type": "library",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "license": "MIT",
     "autoload": {
         "psr-4": {