diff --git a/infra/dev/.terraform.lock.hcl b/infra/dev/.terraform.lock.hcl
index 94b524f5..f36afb80 100644
--- a/infra/dev/.terraform.lock.hcl
+++ b/infra/dev/.terraform.lock.hcl
@@ -6,6 +6,7 @@ provider "registry.terraform.io/hashicorp/aws" {
   constraints = "4.37.0"
   hashes = [
     "h1:LFWMFPtcsxlzbzNlR5XQNfO9/teX2pD60XYycSU4gjQ=",
+    "h1:RQ6CqIhVwJQ0EMeNCH0y9ztLlJalC6QO/CyqmeQUUJ4=",
     "zh:12c2eb60cb1eb0a41d1afbca6fc6f0eed6ca31a12c51858f951a9e71651afbe0",
     "zh:1e17482217c39a12e930e71fd2c9af8af577bec6736b184674476ebcaad28477",
     "zh:1e8163c3d871bbd54c189bf2fe5e60e556d67fa399e4c88c8e6ee0834525dc33",
diff --git a/infra/dev/iam_roles.tf b/infra/dev/iam_roles.tf
index 8983aeca..f67a4134 100644
--- a/infra/dev/iam_roles.tf
+++ b/infra/dev/iam_roles.tf
@@ -44,6 +44,7 @@ data "aws_iam_policy_document" "task_policy" {
       data.aws_ssm_parameter.unit21_api_key.arn,
       data.aws_ssm_parameter.checkout_public_key.arn,
       data.aws_ssm_parameter.checkout_private_key.arn,
+      data.aws_ssm_parameter.checkout_signature_key.arn,
       data.aws_ssm_parameter.owlracle_api_key.arn,
       data.aws_ssm_parameter.owlracle_api_secret.arn,
       data.aws_ssm_parameter.db_password.arn,
@@ -56,7 +57,8 @@ data "aws_iam_policy_document" "task_policy" {
       data.aws_ssm_parameter.sendgrid_api_key.arn,
       data.aws_ssm_parameter.twilio_sms_sid.arn,
       data.aws_ssm_parameter.twilio_account_sid.arn,
-      data.aws_ssm_parameter.twilio_auth_token.arn
+      data.aws_ssm_parameter.twilio_auth_token.arn,
+      data.aws_ssm_parameter.slack_webhook_url.arn,
     ]
   }
 
diff --git a/infra/dev/ssm.tf b/infra/dev/ssm.tf
index 514c2a64..08317b94 100644
--- a/infra/dev/ssm.tf
+++ b/infra/dev/ssm.tf
@@ -38,6 +38,10 @@ data "aws_ssm_parameter" "checkout_private_key" {
   name = "dev-checkout-private-key"
 }
 
+data "aws_ssm_parameter" "checkout_signature_key" {
+  name = "checkout-signature-key"
+}
+
 data "aws_ssm_parameter" "owlracle_api_key" {
   name = "dev-owlracle-api-key"
 }
@@ -90,6 +94,10 @@ data "aws_ssm_parameter" "redis_host_url" {
   name  = "redis-host-url"
 }
 
+data "aws_ssm_parameter" "slack_webhook_url" {
+  name = "slack-webhook-url"
+}
+
 data "aws_kms_key" "kms_key" {
   key_id = "alias/main-kms-key"
 }
diff --git a/infra/dev/variables.tf b/infra/dev/variables.tf
index 86da86dd..d886ff68 100644
--- a/infra/dev/variables.tf
+++ b/infra/dev/variables.tf
@@ -74,6 +74,10 @@ locals {
           name      = "CHECKOUT_SECRET_KEY"
           valueFrom = data.aws_ssm_parameter.checkout_private_key.arn
         },
+        {
+          name      = "WEBHOOK_SECRET_KEY"
+          valueFrom = data.aws_ssm_parameter.checkout_signature_key.arn
+        },
         {
           name      = "OWLRACLE_API_KEY"
           valueFrom = data.aws_ssm_parameter.owlracle_api_key.arn
@@ -125,6 +129,10 @@ locals {
         {
           name      = "REDIS_PASSWORD",
           valuefrom = data.aws_ssm_parameter.redis_auth_token.arn
+        },
+        {
+          name      = "SLACK_WEBHOOK_URL"
+          valueFrom = data.aws_ssm_parameter.slack_webhook_url.arn
         }
       ]
       environment = [