diff --git a/certbot-nginx/certbot_nginx/_internal/parser.py b/certbot-nginx/certbot_nginx/_internal/parser.py
index 72d4d38de..0c1151826 100644
--- a/certbot-nginx/certbot_nginx/_internal/parser.py
+++ b/certbot-nginx/certbot_nginx/_internal/parser.py
@@ -424,8 +424,8 @@ def _parse_ssl_options(ssl_options):
         except IOError:
             logger.warning("Missing NGINX TLS options file: %s", ssl_options)
         except UnicodeDecodeError:
-            logger.warn("Could not read file: %s due to invalid character. "
-                        "Only UTF-8 encoding is supported.", ssl_options)
+            logger.warning("Could not read file: %s due to invalid character. "
+                           "Only UTF-8 encoding is supported.", ssl_options)
         except pyparsing.ParseBaseException as err:
             logger.debug("Could not parse file: %s due to %s", ssl_options, err)
     return []