diff --git a/.aws/ecs-task-definition.json b/.aws/ecs-task-definition.json
index 6427f60..e52cb72 100644
--- a/.aws/ecs-task-definition.json
+++ b/.aws/ecs-task-definition.json
@@ -15,6 +15,14 @@
             ],
             "essential": true,
             "environment": [
+                {
+                    "name": "ENV",
+                    "value": "prod"
+                },
+                {
+                    "name": "AWS_S3_REGION",
+                    "value": "ap-northeast-2"
+                }
             ],
             "environmentFiles": [],
             "mountPoints": [],
diff --git a/src/config/S3Config.py b/src/config/S3Config.py
index 9d14e78..47080f7 100644
--- a/src/config/S3Config.py
+++ b/src/config/S3Config.py
@@ -15,6 +15,11 @@
 if ENV == "local-profile":
     session = boto3.Session(profile_name=AWS_PROFILE)
     s3_client = session.client("s3")
+elif ENV == "prod":
+    s3_client = boto3.client(
+        "s3",
+        region_name=AWS_S3_REGION
+    )
 else:
     s3_client = boto3.client(
         "s3",