diff --git a/metadata/service/server/router.yml b/metadata/service/server/router.yml
index 577743c..6636757 100644
--- a/metadata/service/server/router.yml
+++ b/metadata/service/server/router.yml
@@ -43,14 +43,13 @@
           host: ${_param:heka_router_output_host}
           port: 9200
           encoder: es_json
-          message_matcher: TRUE
+          message_matcher: "TRUE"
         dashboard01:
           engine: dashboard
           ticker_interval: 30
       encoder:
         es_json:
           engine: es-json
-          message_matcher: TRUE
           index: logfile-%{%Y.%m.%d}
           es_index_from_timestamp: true