diff --git a/main.py b/main.py
index df149bc..b1b9930 100644
--- a/main.py
+++ b/main.py
@@ -215,7 +215,7 @@ def run_inference(es_host, es_user, es_pass, target_index_date_str):
     )
     args = parser.parse_args()
     
-    ssm_client = boto3.client('ssm')
+    ssm_client = boto3.client('ssm', region_name='ap-northeast-2')
     
     try:
         ES_HOST = ssm_client.get_parameter(Name='/planit/llm/es-host')['Parameter']['Value']