diff --git a/composer.json b/composer.json
index ec1ef53..5e0230f 100644
--- a/composer.json
+++ b/composer.json
@@ -5,6 +5,6 @@
     },
     "require" : {
         "level-2/maphper" : "^0.9",
-        "level-2/dice" : "^3.0"
+        "level-2/dice" : "^4.0"
     }
 }
diff --git a/src/Json.php b/src/Json.php
index 04c53e2..923379c 100644
--- a/src/Json.php
+++ b/src/Json.php
@@ -31,7 +31,7 @@ public function addLoader($datasourceType, DataSource $datasource) {
     }
 
     private function addMaphper($name, $config, DataSource $datasource) {
-        $this->dice->addRule('$Maphper_Source_' . $name, $datasource->load($config));
+        $this->dice = $this->dice->addRule('$Maphper_Source_' . $name, $datasource->load($config));
         $mapper = [
             'instanceOf' => 'Maphper\\Maphper',
             'substitutions' => ['Maphper\\DataSource' => [\Dice\Dice::INSTANCE => '$Maphper_Source_' . $name]],
@@ -48,12 +48,12 @@ private function addMaphper($name, $config, DataSource $datasource) {
         if (isset($config['resultClass'])) $mapper['constructParams'] = [['resultClass' => function () use ($config) {
             return $this->dice->create($config['resultClass']);
         }]];
-        $this->dice->addRule('$Maphper_' . $name, $mapper);
+        $this->dice = $this->dice->addRule('$Maphper_' . $name, $mapper);
     }
 
     private function addRelation($relationRuleName, $relation) {
         if ($relation['type'] === "ManyMany") {
-            $this->dice->addRule($relationRuleName, [
+            $this->dice = $this->dice->addRule($relationRuleName, [
                 'instanceOf' => 'Maphper\Relation\ManyMany',
                 'constructParams' => [
                     [\Dice\Dice::INSTANCE => '$Maphper_' . $relation['intermediate']],
@@ -63,7 +63,7 @@ private function addRelation($relationRuleName, $relation) {
             ]);
         }
         else {
-            $this->dice->addRule($relationRuleName, [
+            $this->dice = $this->dice->addRule($relationRuleName, [
                 'instanceOf' => 'Maphper\Relation\\' . ucwords($relation['type']),
                 'constructParams' => [
                     [\Dice\Dice::INSTANCE => '$Maphper_' . $relation['to']],