diff --git a/hotreload/hotreload.py b/hotreload/hotreload.py
index d039a8a..8a48501 100644
--- a/hotreload/hotreload.py
+++ b/hotreload/hotreload.py
@@ -97,13 +97,13 @@ class HotReloadHandler(RegexMatchingEventHandler):
         else:
             dest = ""
 
-        self.logger.info(f"File {event.src_path} has been {event.event_type}{dest}.")
+        self.logger.info("File %s has been %s%s.", event.src_path, event.event_type, dest)
 
         run_coroutine_threadsafe(self.reload_cogs(cogs_to_reload), loop=self.bot.loop)
 
     async def reload_cogs(self, cog_names: Sequence[str]) -> None:
         """Reload modified cog."""
         core_logic = CoreLogic(bot=self.bot)
-        self.logger.info(f"Reloading cogs: {humanize_list(cog_names, style='unit')}")
+        self.logger.info("Reloading cogs: %s", humanize_list(cog_names, style="unit"))
         await core_logic._reload(pkg_names=cog_names)
-        self.logger.info(f"Reloaded cogs: {humanize_list(cog_names, style='unit')}")
+        self.logger.info("Reloaded cogs: %s", humanize_list(cog_names, style="unit"))