diff --git a/src/Entities/Interfaces/ScopeEntityInterface.php b/src/Entities/Interfaces/ScopeEntityInterface.php
index b1c40537..b4ce04ac 100644
--- a/src/Entities/Interfaces/ScopeEntityInterface.php
+++ b/src/Entities/Interfaces/ScopeEntityInterface.php
@@ -1,7 +1,7 @@
 <?php
 namespace League\OAuth2\Server\Entities\Interfaces;
 
-interface ScopeEntityInterface
+interface ScopeEntityInterface extends \JsonSerializable
 {
     /**
      * Get the scope's identifier
diff --git a/src/Entities/ScopeEntity.php b/src/Entities/ScopeEntity.php
index 01345745..09fd0227 100644
--- a/src/Entities/ScopeEntity.php
+++ b/src/Entities/ScopeEntity.php
@@ -11,4 +11,12 @@ use League\OAuth2\Server\Entities\Traits\EntityTrait;
 class ScopeEntity implements ScopeEntityInterface
 {
     use EntityTrait;
+
+    /**
+     * @inheritdoc
+     */
+    function jsonSerialize()
+    {
+        return $this->getIdentifier();
+    }
 }