diff --git a/terraform/cloudflare_network_admin_services.tf b/terraform/cloudflare_network_admin_services.tf
index 900402625..f451f678a 100644
--- a/terraform/cloudflare_network_admin_services.tf
+++ b/terraform/cloudflare_network_admin_services.tf
@@ -21,7 +21,7 @@ resource "cloudflare_access_application" "debug_admin_jmx" {
   type                      = "self_hosted"
   session_duration          = "24h"
 
-  http_only_cookie_attribute = false
+  http_only_cookie_attribute = true
 }
 
 resource "cloudflare_access_policy" "debug_admin_jmx" {
diff --git a/terraform/cloudflare_network_debug_proxy_to_op.tf b/terraform/cloudflare_network_debug_proxy_to_op.tf
index 26a4ba76d..b1b011fdd 100644
--- a/terraform/cloudflare_network_debug_proxy_to_op.tf
+++ b/terraform/cloudflare_network_debug_proxy_to_op.tf
@@ -18,7 +18,7 @@ resource "cloudflare_access_application" "debug_vps_to_op_network" {
   # オンプレ側が1日に1回再起動するのでセッション長は高々24時間になる
   session_duration          = "30h"
 
-  http_only_cookie_attribute = false
+  http_only_cookie_attribute = true
 }
 
 resource "cloudflare_access_service_token" "debug_linode_to_onp" {
diff --git a/terraform/cloudflare_network_prod_proxy_to_op.tf b/terraform/cloudflare_network_prod_proxy_to_op.tf
index e16964515..62c6d67b0 100644
--- a/terraform/cloudflare_network_prod_proxy_to_op.tf
+++ b/terraform/cloudflare_network_prod_proxy_to_op.tf
@@ -18,7 +18,7 @@ resource "cloudflare_access_application" "prod_vps_to_op_network" {
   # オンプレ側が1日に1回再起動するのでセッション長は高々24時間になる
   session_duration          = "30h"
 
-  http_only_cookie_attribute = false
+  http_only_cookie_attribute = true
 }
 
 resource "cloudflare_access_service_token" "prod_linode_to_onp" {