diff --git a/src/Grant/AbstractGrant.php b/src/Grant/AbstractGrant.php
index 934456e6..74af64b9 100644
--- a/src/Grant/AbstractGrant.php
+++ b/src/Grant/AbstractGrant.php
@@ -70,6 +70,16 @@ abstract class AbstractGrant implements GrantTypeInterface
      */
     protected $scopeRepository;
 
+    /**
+     * @var string
+     */
+    protected $pathToPrivateKey;
+
+    /**
+     * @var string
+     */
+    protected $pathToPublicKey;
+
     /**
      * @param ClientRepositoryInterface $clientRepository
      */
@@ -94,6 +104,22 @@ abstract class AbstractGrant implements GrantTypeInterface
         $this->scopeRepository = $scopeRepository;
     }
 
+    /**
+     * @param string $pathToPrivateKey
+     */
+    public function setPathToPrivateKey($pathToPrivateKey)
+    {
+        $this->pathToPrivateKey = $pathToPrivateKey;
+    }
+
+    /**
+     * @param string $pathToPublicKey
+     */
+    public function setPathToPublicKey($pathToPublicKey)
+    {
+        $this->pathToPublicKey = $pathToPublicKey;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/src/Grant/GrantTypeInterface.php b/src/Grant/GrantTypeInterface.php
index 4a474af5..5bc9bf08 100644
--- a/src/Grant/GrantTypeInterface.php
+++ b/src/Grant/GrantTypeInterface.php
@@ -95,4 +95,17 @@ interface GrantTypeInterface
      */
     public function setScopeRepository(ScopeRepositoryInterface $scopeRepository);
 
+    /**
+     * Set the path to the private key
+     *
+     * @param string $pathToPrivateKey
+     */
+    public function setPathToPrivateKey($pathToPrivateKey);
+
+    /**
+     * Set the path to the public key
+     *
+     * @param string $pathToPublicKey
+     */
+    public function setPathToPublicKey($pathToPublicKey);
 }