diff --git a/netfilterqueue/_version.py b/netfilterqueue/_version.py
index 478d388..aa14a86 100644
--- a/netfilterqueue/_version.py
+++ b/netfilterqueue/_version.py
@@ -1,4 +1,4 @@
 # This file is imported from __init__.py and exec'd from setup.py
 
-__version__ = "1.0.0"
+__version__ = "1.0.0+dev"
 VERSION = (1, 0, 0)