diff --git a/.github/workflows/terraform.yml b/.github/workflows/terraform.yml
index 2935718..226f389 100644
--- a/.github/workflows/terraform.yml
+++ b/.github/workflows/terraform.yml
@@ -45,8 +45,9 @@ jobs:
       run: terraform apply -auto-approve -input=false
 
     - name: Deploy Project via Dispatcher
+      if: env.TF_WORKSPACE == 'prod'
       env:
-        DISPATCHER_EVENT: ${{env.TF_WORKSPACE == 'prod' && 'deploy-prod' || 'deploy-staging'}}
+        DISPATCHER_EVENT: 'deploy-prod'
       run: |
         curl -X POST https://api.github.com/repos/HideyoshiNakazone/infra-hideyoshi.com/dispatches \
              -H 'Accept: application/vnd.github.everest-preview+json' \
diff --git a/instances/instance.tf b/instances/instance.tf
index bf6c8c6..525e91e 100644
--- a/instances/instance.tf
+++ b/instances/instance.tf
@@ -72,7 +72,7 @@ resource "aws_security_group" "project_pool" {
 
 resource "aws_instance" "main" {
     ami = "ami-0af6e9042ea5a4e3e"
-    instance_type = "t3a.small"
+    instance_type = "t2.micro"
     vpc_security_group_ids = [ aws_security_group.project_pool.id ]
 
     key_name = aws_key_pair.ssh_key_main.key_name