diff --git a/manifests/pipecd/templates/envoy-configmap.yaml b/manifests/pipecd/templates/envoy-configmap.yaml
index 57795fd342..d25fc02593 100644
--- a/manifests/pipecd/templates/envoy-configmap.yaml
+++ b/manifests/pipecd/templates/envoy-configmap.yaml
@@ -103,6 +103,8 @@ data:
                   socket_address:
                     address: {{ include "pipecd.fullname" . }}-server
                     port_value: 9080
+        track_cluster_stats:
+          request_response_sizes: true
       - name: server-web-api
         http2_protocol_options: {}
         connect_timeout: 0.25s
@@ -117,6 +119,8 @@ data:
                   socket_address:
                     address: {{ include "pipecd.fullname" . }}-server
                     port_value: 9081
+        track_cluster_stats:
+          request_response_sizes: true
       - name: server-api
         http2_protocol_options: {}
         connect_timeout: 0.25s
@@ -131,6 +135,8 @@ data:
                   socket_address:
                     address: {{ include "pipecd.fullname" . }}-server
                     port_value: 9083
+        track_cluster_stats:
+          request_response_sizes: true
       - name: server-http
         connect_timeout: 0.25s
         type: STRICT_DNS
@@ -144,3 +150,5 @@ data:
                   socket_address:
                     address: {{ include "pipecd.fullname" . }}-server
                     port_value: 9082
+        track_cluster_stats:
+          request_response_sizes: true