diff --git a/docker/fluentd/fluent.conf b/docker/fluentd/fluent.conf
index 296b169..42336aa 100644
--- a/docker/fluentd/fluent.conf
+++ b/docker/fluentd/fluent.conf
@@ -8,8 +8,7 @@
   @type parser
   key_name log
   reserve_data true
-  format /^(?<message>.*)\b(SIGTERM|SEVERE ERROR|FATAL|CRITICAL)\b/i json
-  # Additional JSON parsing configuration (if necessary) 
+    expression /^(?<message>.*)\b(SIGTERM|SEVERE ERROR|FATAL|CRITICAL)\b/i
 </filter>
 
 <match docker.**>