diff --git a/_config/auth.yml b/_config/auth.yml
index aeb5a57..7a405e9 100644
--- a/_config/auth.yml
+++ b/_config/auth.yml
@@ -1,5 +1,7 @@
 ---
-Name: realmeauthentication
+Name: realmeauthenticator
+Only:
+  EnvVarSet: REALME_CERT_DIR
 ---
 SilverStripe\Core\Injector\Injector:
   SilverStripe\Security\Security: