diff --git a/lb2.py b/lb2.py
index bf7d7e7..52a5ffd 100644
--- a/lb2.py
+++ b/lb2.py
@@ -167,7 +167,7 @@ def create_launch_template(ec2_client, key_name, security_group_id):
         LaunchTemplateData={
             'ImageId': AMI_ID,
             'InstanceType': INSTANCE_TYPE,
-            'SecurityGroupsIds': [security_group_id],
+            'SecurityGroupIds': [security_group_id],
             'KeyName': key_name,
             'UserData': user_data
         }