diff --git a/files/acme_renew_cert.py b/files/acme_renew_cert.py
index 571db39..db297ed 100755
--- a/files/acme_renew_cert.py
+++ b/files/acme_renew_cert.py
@@ -346,15 +346,16 @@ def main():
         return 1
 
     if isinstance(config["domains"], list):
-        domains = {domain.name: domain for domain in config["domains"]}
+        domains = {domain["name"]: domain for domain in config["domains"]}
         if len(domains) != len(config["domains"]):
             domain_uniques = set()
             domain_duplicates = set()
             for domain in config["domains"]:
-                if domain.name not in domain_uniques:
-                    domain_uniques.add(domain.name)
+                domain_name = domain["name"]
+                if domain_name not in domain_uniques:
+                    domain_uniques.add(domain_name)
                 else:
-                    domain_duplicates.add(domain.name)
+                    domain_duplicates.add(domain_name)
             logging.error(f"Duplicate domain name(s) found: {domain_uniques}")
             return 2