diff --git a/gns3server/version.py b/gns3server/version.py
index beebb243..bb224a5d 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__ = "1.3.0"
-__version_info__ = (1, 3, 0, 0)
+__version__ = "1.3.1.dev1"
+__version_info__ = (1, 3, 0, 99)