diff --git a/labelme/label_file.py b/labelme/label_file.py
index 56359d69eea2626d1ec3388dd4f64ab73785dcb3..1ad141b05b1da6b33cd5a7b5dbcf67d998843962 100644
--- a/labelme/label_file.py
+++ b/labelme/label_file.py
@@ -3,6 +3,8 @@ import json
 import os.path
 import sys
 
+from ._version import __version__
+
 
 PY2 = sys.version_info[0] == 2
 
@@ -85,6 +87,7 @@ class LabelFile(object):
         if flags is None:
             flags = []
         data = dict(
+            version=__version__,
             flags=flags,
             shapes=shapes,
             lineColor=lineColor,