diff --git a/gns3server/version.py b/gns3server/version.py
index bf94719e..1e848f62 100644
--- a/gns3server/version.py
+++ b/gns3server/version.py
@@ -23,8 +23,8 @@
 # or negative for a release candidate or beta (after the base version
 # number has been incremented)
 
-__version__ = "2.1.20"
-__version_info__ = (2, 1, 20, 0)
+__version__ = "2.1.21dev1"
+__version_info__ = (2, 1, 21, 99)
 
 # If it's a git checkout try to add the commit
 if "dev" in __version__: