diff --git a/CloudFormation/wordpress-ecs-fargate.yaml b/CloudFormation/wordpress-ecs-fargate.yaml
index 4b7a422..89d648d 100644
--- a/CloudFormation/wordpress-ecs-fargate.yaml
+++ b/CloudFormation/wordpress-ecs-fargate.yaml
@@ -29,7 +29,7 @@
     # different AZ to be chosen.
     AZRegions:
       ap-northeast-1:
-        AZs: ["a", "b"]
+        AZs: ["a", "c"]
       ap-northeast-2:
         AZs: ["a", "b"]
       ap-south-1:
@@ -641,4 +641,4 @@
       Value:
         Ref: "WordPressTargetGroup"
       Export:
-        Name: !Sub "${AWS::Region}-${AWS::StackName}-ALBTargetGroup"
\ No newline at end of file
+        Name: !Sub "${AWS::Region}-${AWS::StackName}-ALBTargetGroup"