diff --git a/CRM/TwingleCampaign/Upgrader.php b/CRM/TwingleCampaign/Upgrader.php
index e86b677..dcbb82f 100644
--- a/CRM/TwingleCampaign/Upgrader.php
+++ b/CRM/TwingleCampaign/Upgrader.php
@@ -1,11 +1,13 @@
 <?php
 
+use CRM\TwingleCampaign\Utils\ExtensionCache;
 use CRM_TwingleCampaign_ExtensionUtil as E;
 use CRM\TwingleCampaign\BAO as BAO;
 
 include E::path() . '/CRM/TwingleCampaign/BAO/CampaignType.php';
 include E::path() . '/CRM/TwingleCampaign/BAO/CustomField.php';
 include E::path() . '/CRM/TwingleCampaign/BAO/CustomGroup.php';
+include_once E::path() . '/CRM/TwingleCampaign/BAO/Configuration.php';
 
 /**
  * Collection of upgrade steps.
@@ -111,6 +113,8 @@ class CRM_TwingleCampaign_Upgrader extends CRM_TwingleCampaign_Upgrader_Base {
        $result->delete();
      }
    }
+    // Delete all settings for this extension
+    Configuration::deleteAll();
  }
 
  /**