diff --git a/src/Service/LastTweetsManager.php b/src/Service/LastTweetsManager.php
index 058634e..a561bf2 100755
--- a/src/Service/LastTweetsManager.php
+++ b/src/Service/LastTweetsManager.php
@@ -127,7 +127,7 @@ class LastTweetsManager {
    *   NormalizeTwetts manager.
    */
   public function __construct(ConfigFactory $config, LanguageManager $languageManager, LastTweetsGateway $lastTweetsGateway, NormalizeTweetsManager $normalizeTweetsManager) {
-    $this->config = $config->getEditable('last_tweets.settings');
+    $this->config = $config->get('last_tweets.settings');
     $this->languageManager = $languageManager;
     $this->lastTweetsGateway = $lastTweetsGateway;
     $this->normalizeTweetsManager = $normalizeTweetsManager;