diff --git a/common/variable.py b/common/variable.py
index 779a801..f4f1528 100644
--- a/common/variable.py
+++ b/common/variable.py
@@ -38,8 +38,8 @@ def _read_config(key):
     except:
         return None
 
-debug_mode = _read_config("common.debug_mode")
-log_length_limit = _read_config("common.log_length_limit")
+debug_mode = _read_config("common.debug_mode") if _read_config("common.debug_mode") else False
+log_length_limit = _read_config("common.log_length_limit") if _read_config("common.log_length_limit") else 500
 running = True
 config = {}
 workdir = os.getcwd()