diff --git a/src/Balancer.php b/src/Balancer.php
index e9c66d8..ec47641 100644
--- a/src/Balancer.php
+++ b/src/Balancer.php
@@ -20,6 +20,26 @@ public function add($name, array $percentages)
         $this->features[$feature->name()] = $feature;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function setConfig(array $config)
+    {
+        $this->features = [];
+
+        foreach ($config as $feature => $percentages) {
+            $this->add($feature, $percentages);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getConfig()
+    {
+        return $this->features;
+    }
+
     /**
      * {@inheritdoc}
      */
@@ -51,6 +71,6 @@ private function seed($seed = null)
      */
     function jsonSerialize()
     {
-        return $this->features;
+        return $this->getConfig();
     }
 }
diff --git a/src/BalancerBuilder.php b/src/BalancerBuilder.php
index 92360e1..f393648 100644
--- a/src/BalancerBuilder.php
+++ b/src/BalancerBuilder.php
@@ -45,7 +45,7 @@ class BalancerBuilder
     public function create(array $config = [])
     {
         $balancer = new Balancer();
-        $this->addConfig($balancer, $config);
+        $balancer->setConfig($config);
 
         if ($this->monitor instanceof Monitor) {
             $balancer = new MonitoringDecorator($balancer, $this->monitor, $this->metric);
@@ -107,17 +107,4 @@ public function withoutExceptions()
 
         return $this;
     }
-
-    /**
-     * Add the features to the balancer
-     *
-     * @param BalancerInterface $balancer
-     * @param array             $config
-     */
-    private function addConfig(BalancerInterface $balancer, array $config)
-    {
-        foreach ($config as $feature => $percentages) {
-            $balancer->add($feature, $percentages);
-        }
-    }
 }
diff --git a/src/BalancerInterface.php b/src/BalancerInterface.php
index b25b67e..f5aca51 100644
--- a/src/BalancerInterface.php
+++ b/src/BalancerInterface.php
@@ -12,9 +12,27 @@ interface BalancerInterface extends \JsonSerializable
      *
      * @param string $name
      * @param array  $percentages
+     *
+     * @throws InvalidArgumentException When any parameter given is not acceptable
      */
     public function add($name, array $percentages);
 
+    /**
+     * Sets the features configuration
+     *
+     * @param array $config
+     *
+     * @throws InvalidArgumentException When any parameter given is not acceptable
+     */
+    public function setConfig(array $config);
+
+    /**
+     * Gets the features configuration
+     *
+     * @return array
+     */
+    public function getConfig();
+
     /**
      * Gets the path that a seed has to follow for a given feature 
      *
diff --git a/src/Decorator/BalancerDecorator.php b/src/Decorator/BalancerDecorator.php
index 4b37bfd..aa3ad81 100644
--- a/src/Decorator/BalancerDecorator.php
+++ b/src/Decorator/BalancerDecorator.php
@@ -27,6 +27,22 @@ public function add($name, array $percentages)
         $this->balancer->add($name, $percentages);
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function setConfig(array $config)
+    {
+        $this->balancer->config($config);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getConfig()
+    {
+        return $this->balancer->getConfig();
+    }
+
     /**
      * {@inheritdoc}
      */