diff --git a/metadata/service/server/shipper.yml b/metadata/service/server/shipper.yml
index 75e4496..1d39119 100644
--- a/metadata/service/server/shipper.yml
+++ b/metadata/service/server/shipper.yml
@@ -17,13 +17,13 @@
           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