diff --git a/qlib/__init__.py b/qlib/__init__.py
index 20c2cab4a3..99035e5014 100644
--- a/qlib/__init__.py
+++ b/qlib/__init__.py
@@ -147,7 +147,7 @@ def init_from_yaml_conf(conf_path, **kwargs):
     """
 
     with open(conf_path) as f:
-        config = yaml.load(f, Loader=yaml.SafeLoader)
+        config = yaml.safe_load(f)
     config.update(kwargs)
     default_conf = config.pop("default_conf", "client")
     init(default_conf, **config)
diff --git a/qlib/contrib/online/manager.py b/qlib/contrib/online/manager.py
index cf850b9dac..b0be7f0768 100644
--- a/qlib/contrib/online/manager.py
+++ b/qlib/contrib/online/manager.py
@@ -110,7 +110,7 @@ def add_user(self, user_id, config_file, add_date):
             raise ValueError("User data for {} already exists".format(user_id))
 
         with config_file.open("r") as fp:
-            config = yaml.load(fp)
+            config = yaml.safe_load(fp)
         # load model
         model = init_instance_by_config(config["model"])
 
diff --git a/qlib/contrib/online/utils.py b/qlib/contrib/online/utils.py
index 611af63e4a..71a6a91ec2 100644
--- a/qlib/contrib/online/utils.py
+++ b/qlib/contrib/online/utils.py
@@ -88,7 +88,7 @@ def prepare(um, today, user_id, exchange_config=None):
     dates.append(get_next_trading_date(dates[-1], future=True))
     if exchange_config:
         with pathlib.Path(exchange_config).open("r") as fp:
-            exchange_paras = yaml.load(fp)
+            exchange_paras = yaml.safe_load(fp)
     else:
         exchange_paras = {}
     trade_exchange = Exchange(trade_dates=dates, **exchange_paras)
diff --git a/qlib/contrib/tuner/config.py b/qlib/contrib/tuner/config.py
index f23d1b8740..247fa6a4fa 100644
--- a/qlib/contrib/tuner/config.py
+++ b/qlib/contrib/tuner/config.py
@@ -14,7 +14,7 @@ def __init__(self, config_path):
         self.config_path = config_path
 
         with open(config_path) as fp:
-            config = yaml.load(fp)
+            config = yaml.safe_load(fp)
         self.config = copy.deepcopy(config)
 
         self.pipeline_ex_config = PipelineExperimentConfig(config.get("experiment", dict()), self)
diff --git a/qlib/utils/__init__.py b/qlib/utils/__init__.py
index f5e981c24d..be7969b658 100644
--- a/qlib/utils/__init__.py
+++ b/qlib/utils/__init__.py
@@ -128,10 +128,10 @@ def parse_config(config):
     # Check whether config is file
     if os.path.exists(config):
         with open(config, "r") as f:
-            return yaml.load(f, Loader=yaml.SafeLoader)
+            return yaml.safe_load(f)
     # Check whether the str can be parsed
     try:
-        return yaml.load(config)
+        return yaml.safe_load(config)
     except BaseException:
         raise ValueError("cannot parse config!")
 
diff --git a/qlib/workflow/cli.py b/qlib/workflow/cli.py
index f7455797bd..6eba962779 100644
--- a/qlib/workflow/cli.py
+++ b/qlib/workflow/cli.py
@@ -44,7 +44,7 @@ def sys_config(config, config_path):
 # worflow handler function
 def workflow(config_path, experiment_name="workflow", uri_folder="mlruns"):
     with open(config_path) as fp:
-        config = yaml.load(fp, Loader=yaml.SafeLoader)
+        config = yaml.safe_load(fp)
 
     # config the `sys` section
     sys_config(config, config_path)