diff --git a/gns3server/version.py b/gns3server/version.py
index a8d7b0c2..fc2f34ba 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__ = "2.2.50"
-__version_info__ = (2, 2, 50, 0)
+__version__ = "2.2.51.dev1"
+__version_info__ = (2, 2, 51, 99)
 
 if "dev" in __version__:
     try: