diff --git a/extensions/apm-server/config/apm-server.yml b/extensions/apm-server/config/apm-server.yml
index cb6582e..0d3a5dc 100644
--- a/extensions/apm-server/config/apm-server.yml
+++ b/extensions/apm-server/config/apm-server.yml
@@ -3,4 +3,6 @@ apm-server:
 
 output:
   elasticsearch:
-    hosts: http://elasticsearch:9200
+    hosts: ['http://elasticsearch:9200']
+    username: elastic
+    password: changeme