diff --git a/metadata/service/server/shipper.yml b/metadata/service/server/shipper.yml
index 2376a22..827432b 100644
--- a/metadata/service/server/shipper.yml
+++ b/metadata/service/server/shipper.yml
@@ -11,13 +11,13 @@
           log_directory: /var/log
           file_match: syslog\.?(?P<Index>\d+)?(.gz)?
           decoder: RsyslogDecoder
-          priority: "^Index"
+          priority: \["^Index"\]
         rsyslog_auth:
           engine: logstreamer
           log_directory: /var/log
           file_match: auth\.log\.?(?P<Index>\d+)?(.gz)?
           decoder: RsyslogDecoder
-          priority: "^Index"
+          priority: \["^Index"\]
       decoder:
         rsyslog:
           engine: rsyslog