diff --git a/src/logs.py b/src/logs.py
index cce09e9..2fe3edc 100644
--- a/src/logs.py
+++ b/src/logs.py
@@ -13,7 +13,7 @@ from pathlib import Path
 from os import getenv
 
 LOG_FILENAME_FORMAT_PREFIX = getenv("LOG_FILENAME_FORMAT_PREFIX")
-MAX_LOGFILE_AGE_DAYS = getenv("MAX_LOGFILE_AGE_DAYS")
+MAX_LOGFILE_AGE_DAYS = int(getenv("MAX_LOGFILE_AGE_DAYS"))
 
 log = logging.getLogger(__name__)
 
@@ -47,7 +47,7 @@ class LogSetup:
         Search through the logs directory and delete any expired log files.
         """
 
-        for path in self.logs_dir.glob('*.txt'):
+        for path in self.logs_dir.glob('*.log'):
             prefix = path.stem.split('_')[0]
             try:
                 log_date = datetime.strptime(prefix, LOG_FILENAME_FORMAT_PREFIX)