diff --git a/parl/utils/visualdl.py b/parl/utils/visualdl.py
index bbf1aa08e313440a47a73936d1be61ca9701f166..6988a23fa4f15d48a54d51765f1c51d20e659553 100644
--- a/parl/utils/visualdl.py
+++ b/parl/utils/visualdl.py
@@ -19,7 +19,7 @@ from parl.utils.machine_info import get_ip_address
 __all__ = []
 
 _writer = None
-_WRITTER_METHOD = ['add_scalar']
+_WRITTER_METHOD = ['add_scalar', 'add_histogram', 'close', 'flush']
 
 
 def create_file_after_first_call(func_name):