diff --git a/tqdm/_version.py b/tqdm/_version.py
index ece373e4..6e613598 100644
--- a/tqdm/_version.py
+++ b/tqdm/_version.py
@@ -1,5 +1,5 @@
 # Definition of the version number
-version_info = 2, 0, 0  # major, minor, patch, extra
+version_info = 2, 0, 0, 'dev'  # major, minor, patch, extra
 
 # Nice string for the version (mimic how IPython composes its version str)
 __version__ = '-'.join(map(str, version_info)).replace('-', '.').strip('-')