diff --git a/tackerclient/osc/v1/nfvo/vim.py b/tackerclient/osc/v1/nfvo/vim.py
index c1c64113..67072b64 100644
--- a/tackerclient/osc/v1/nfvo/vim.py
+++ b/tackerclient/osc/v1/nfvo/vim.py
@@ -230,7 +230,8 @@ class UpdateVIM(command.ShowOne):
             with open(parsed_args.config_file) as f:
                 config_yaml = f.read()
             try:
-                config_param = yaml.load(config_yaml)
+                config_param = yaml.load(config_yaml,
+                                         Loader=yaml.SafeLoader)
             except yaml.YAMLError as e:
                 raise exceptions.InvalidInput(reason=e)
         vim_obj = body[_VIM]
diff --git a/tackerclient/tacker/v1_0/nfvo/vim.py b/tackerclient/tacker/v1_0/nfvo/vim.py
index 949e2050..ea9a4ef7 100644
--- a/tackerclient/tacker/v1_0/nfvo/vim.py
+++ b/tackerclient/tacker/v1_0/nfvo/vim.py
@@ -117,7 +117,8 @@ class UpdateVIM(tackerV10.UpdateCommand):
             with open(parsed_args.config_file) as f:
                 config_yaml = f.read()
             try:
-                config_param = yaml.load(config_yaml)
+                config_param = yaml.load(config_yaml,
+                                         Loader=yaml.SafeLoader)
             except yaml.YAMLError as e:
                 raise exceptions.InvalidInput(reason=e)
         vim_obj = body[self.resource]