diff --git a/paddlepalm/_downloader.py b/paddlepalm/_downloader.py
index d5c950f72cad4dbfbb07ea669d70670025d987d8..f92443f5ffb93207a9cbe550298d1309d395c29b 100644
--- a/paddlepalm/_downloader.py
+++ b/paddlepalm/_downloader.py
@@ -28,7 +28,7 @@ import ssl
 __all__ = ["download", "ls"]
 
 # for https
-ssl._create_default_https_context = ssl._create_unverified_context
+# ssl._create_default_https_context = ssl._create_unverified_context
 
 _items = {
     'pretrain': {'ernie-en-uncased-large': 'https://ernie.bj.bcebos.com/ERNIE_Large_en_stable-2.0.0.tar.gz',
@@ -114,7 +114,7 @@ def _convert(path, silent=False):
         if os.path.exists(path + '/params/'):
             os.rename(path + '/params/', path + '/params1/')
             os.mkdir(path + '/params/')
-            tar_model = tarfile.open(path + '/params/' + '__palmmodel__', 'w:gz')
+            tar_model = tarfile.open(path + '/params/' + '__palmmodel__', 'w')
             tar_info = open(path + '/params/'+ '__palminfo__', 'w')
             for root, dirs, files in os.walk(path + '/params1/'):
                 for file in files:
diff --git a/paddlepalm/utils/saver.py b/paddlepalm/utils/saver.py
index 2ec4c9f597b1ec2eb70e038e0a2630f4232ce551..ab6d288900a807f05153e38c999802c1e8facfe8 100644
--- a/paddlepalm/utils/saver.py
+++ b/paddlepalm/utils/saver.py
@@ -55,7 +55,7 @@ def init_pretraining_params(exe,
     print("Loading pretraining parameters from {}...".format(
         pretraining_params_path))
 
-    with tarfile.open(os.path.join(pretraining_params_path, '__palmmodel__'), 'r:gz') as f:
+    with tarfile.open(os.path.join(pretraining_params_path, '__palmmodel__'), 'r') as f:
         f.extractall(os.path.join(pretraining_params_path, '.temp'))
     
     log_path = os.path.join(pretraining_params_path, '__palmmodel__')