diff --git a/private_storage/storage/s3boto3.py b/private_storage/storage/s3boto3.py
index 320446c..d564bc3 100644
--- a/private_storage/storage/s3boto3.py
+++ b/private_storage/storage/s3boto3.py
@@ -16,8 +16,8 @@ class PrivateS3BotoStorage(S3Boto3Storage):
     Private storage bucket for S3
     """
 
-    access_key_names = ['AWS_PRIVATE_S3_ACCESS_KEY_ID', 'AWS_PRIVATE_ACCESS_KEY_ID'] + S3Boto3Storage.access_key_names
-    secret_key_names = ['AWS_PRIVATE_S3_SECRET_ACCESS_KEY', 'AWS_PRIVATE_SECRET_ACCESS_KEY'] + S3Boto3Storage.secret_key_names
+    #access_key_names = ['AWS_PRIVATE_S3_ACCESS_KEY_ID', 'AWS_PRIVATE_ACCESS_KEY_ID'] + getattr(S3Boto3Storage, 'access_key_names', [])
+    #secret_key_names = ['AWS_PRIVATE_S3_SECRET_ACCESS_KEY', 'AWS_PRIVATE_SECRET_ACCESS_KEY'] + getattr(S3Boto3Storage, 'secret_key_names', [])
 
     def __init__(self, **settings):
         super().__init__(**settings)