diff --git a/lambda/stop-rds/stop-rds.py b/lambda/stop-rds/stop-rds.py
index 9230349d..0a3a0783 100644
--- a/lambda/stop-rds/stop-rds.py
+++ b/lambda/stop-rds/stop-rds.py
@@ -3,8 +3,8 @@ import os
 
 #環境変数 
 client = boto3.client('rds')
-TAGKEY = os.environ['TAGKEY']
-TAGVALUE = os.environ['TAGVALUE']
+AUTO_STOP_TAG_TAGKEY = os.environ['TAGKEY']
+AUTO_STOP_ENABLE = os.environ['TAGVALUE']
 
 def lambda_handler(event, context):
     #クラスターを停止
@@ -13,7 +13,7 @@ def lambda_handler(event, context):
         if cluster['Status'] == "available":
             tags = client.list_tags_for_resource(ResourceName=cluster['DBClusterArn'])
             for tag in tags['TagList']:
-                if tag['Key'] == TAGKEY and tag['Value'] == TAGVALUE:
+                if tag['Key'] == AUTO_STOP_TAG_TAGKEY and tag['Value'] == AUTO_STOP_ENABLE:
                     client.stop_db_cluster(DBClusterIdentifier=cluster['DBClusterIdentifier'])
 
     #インスタンスを停止
@@ -22,6 +22,6 @@ def lambda_handler(event, context):
         if instance['DBInstanceStatus'] == "available":
             tags = client.list_tags_for_resource(ResourceName=instance['DBInstanceArn'])
             for tag in tags['TagList']:
-                if tag['Key'] == TAGKEY and tag['Value'] == TAGVALUE:
+                if tag['Key'] == AUTO_STOP_TAG_TAGKEY and tag['Value'] == AUTO_STOP_ENABLE:
                     client.stop_db_instance(DBInstanceIdentifier=instance['DBInstanceIdentifier'])
                     
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