diff --git a/gns3server/version.py b/gns3server/version.py
index 01b6d7f1..b6e4f133 100644
--- a/gns3server/version.py
+++ b/gns3server/version.py
@@ -23,5 +23,5 @@
 # or negative for a release candidate or beta (after the base version
 # number has been incremented)
 
-__version__ = "1.3.3"
-__version_info__ = (1, 3, 3, 0)
+__version__ = "1.3.4.dev1"
+__version_info__ = (1, 3, 4, -99)