diff --git a/common/utils.py b/common/utils.py
index d360045..ebeae9d 100644
--- a/common/utils.py
+++ b/common/utils.py
@@ -47,6 +47,8 @@ def deprecated(func):
         return func(*args, **kwargs)
     return new_func
 
+import subprocess
+import sys
 def open_file_browser(directory):
     if sys.platform=='win32':
         os.startfile(directory)