diff --git a/run.py b/run.py
index 2e6a8f76..91a2a710 100755
--- a/run.py
+++ b/run.py
@@ -11,7 +11,7 @@
 from time import ctime
 from os import path, environ, stat, name as os_name
 from tempfile import gettempdir
-from logging import DEBUG, basicConfig, info, warning, error
+from logging import DEBUG, basicConfig, info, warning, error, debug
 from subprocess import check_output
 
 import sys
@@ -185,9 +185,11 @@ def main():
     cache = get_config('cache', True) and Cache(CACHE_FILE)
     if cache is False:
         info("Cache is disabled!")
-    elif len(cache) < 1 or get_config.time >= cache.time:
+    elif get_config.time >= cache.time:
         warning("Cache file is out of dated.")
         cache.clear()
+    elif not cache:
+        debug("Cache is empty.")
     update_ip('4', cache, dns, proxy_list)
     update_ip('6', cache, dns, proxy_list)
 
diff --git a/util/cache.py b/util/cache.py
index 98e674b1..50d5da20 100644
--- a/util/cache.py
+++ b/util/cache.py
@@ -9,7 +9,7 @@
 from pickle import dump, load
 from time import time
 
-from logging import info, debug, error
+from logging import info, debug, warning
 
 try:
     from collections.abc import MutableMapping
@@ -51,17 +51,17 @@ def load(self, file=None):
                 try:
                     self.__data = load(data)
                     self.__time = stat(file).st_mtime
+                    return self
                 except ValueError:
-                    self.__data = {}
-                    self.__time = time()
+                    pass
                 except Exception as e:
-                    error(e)
-                    self.__data = {}
-                    self.__time = time()
+                    warning(e)
         else:
             info('cache file not exist')
-            self.__data = {}
-            self.__time = time()
+
+        self.__data = {}
+        self.__time = time()
+        self.__changed = True
         return self
 
     def data(self, key=None, default=None):
@@ -106,7 +106,7 @@ def __update(self):
             self.__time = time()
 
     def clear(self):
-        if self.data():
+        if self.data() is not None:
             self.__data = {}
             self.__update()