diff --git a/db_module/db.py b/db_module/db.py
index c4cae60..fc5f9a5 100644
--- a/db_module/db.py
+++ b/db_module/db.py
@@ -148,7 +148,7 @@ def _pool_healthcheck():
 			conn = pool.get_connection()
 			conn.ping(reconnect=True, attempts=3, delay=1)
 			conn.close()
-			logger.debug(f"[MySQL] Pool healthcheck succeeded")
+			logger.debug("[MySQL] Pool healthcheck succeeded")
 		except Error as e:
 			logger.warning(f"[MySQL] Pool healthcheck failed: {e}")
 			create_connection_pool()