diff --git a/metadata/service/agent/output/filter/common.yml b/metadata/service/agent/output/filter/common.yml
index e59c7d9..4723f19 100644
--- a/metadata/service/agent/output/filter/common.yml
+++ b/metadata/service/agent/output/filter/common.yml
@@ -19,4 +19,4 @@
                   - name: Hostname
                     value: ${fluentd:dollar}{ hostname }
                   - name: Timestamp
-                    value: ${fluentd:dollar}{ time.strftime('%Y-%m-%dT%H:%M:%S.%N%z') }
+                    value: ${fluentd:dollar}{ DateTime.parse(record.fetch("Timestamp", time.strftime('%Y-%m-%dT%H:%M:%S.%N%z'))).strftime('%Y-%m-%dT%H:%M:%S.%N%z') }