diff --git a/slpkg/logging_config.py b/slpkg/logging_config.py
index 38abf70d..2db670a6 100644
--- a/slpkg/logging_config.py
+++ b/slpkg/logging_config.py
@@ -14,6 +14,6 @@ class LoggingConfig:
     encoding: str = 'utf-8'
     log_path: Path = Path('/tmp/slpkg/logs')
     log_file: Path = Path(log_path, 'slpkg.log')
-    d: str = '%s/%s/%s' % (dt.day, dt.month, dt.year)
-    t: str = '%s:%s:%s' % (dt.hour, dt.minute, dt.second)
+    d: str = f'{dt.day}/{dt.month}/{dt.year}'
+    t: str = f'{dt.hour}:{dt.minute}:{dt.second}'
     date: str = f'{d} {t}'