diff --git a/charts/kubezero-logging/Chart.yaml b/charts/kubezero-logging/Chart.yaml
index 28e04a10..b6cf4a68 100644
--- a/charts/kubezero-logging/Chart.yaml
+++ b/charts/kubezero-logging/Chart.yaml
@@ -2,7 +2,7 @@ apiVersion: v2
 name: kubezero-logging
 description: KubeZero Umbrella Chart for complete EFK stack
 type: application
-version: 0.3.7
+version: 0.3.8
 appVersion: 1.2.1
 home: https://kubezero.com
 icon: https://cdn.zero-downtime.net/assets/kubezero/logo-small-64.png
diff --git a/charts/kubezero-logging/values.yaml b/charts/kubezero-logging/values.yaml
index 97508938..5a5bd41f 100644
--- a/charts/kubezero-logging/values.yaml
+++ b/charts/kubezero-logging/values.yaml
@@ -108,6 +108,7 @@ fluentd:
         port 24224
         bind 0.0.0.0
         skip_invalid_event true
+        send_keepalive_packet true
         <transport tls>
           cert_path /mnt/fluentd-certs/tls.crt
           private_key_path /mnt/fluentd-certs/tls.key
@@ -145,8 +146,8 @@ fluentd:
         request_timeout 15s
         suppress_type_name true
 
-        <buffer>
-          @type file
+        <buffer tag>
+          @type file_single
           path /var/log/fluentd-buffers/kubernetes.system.buffer
           flush_mode interval
           flush_thread_count 2
@@ -154,7 +155,6 @@ fluentd:
           flush_at_shutdown true
           retry_type exponential_backoff
           retry_timeout 60m
-          chunk_limit_size 16M
           overflow_action drop_oldest_chunk
         </buffer>
       </match>