diff --git a/mitmproxy/version.py b/mitmproxy/version.py
index d23b2d19b..d9b88e7b7 100644
--- a/mitmproxy/version.py
+++ b/mitmproxy/version.py
@@ -1,4 +1,4 @@
-IVERSION = (3, 0, 0)
+IVERSION = (3, 0, 0, 'dev')
 VERSION = ".".join(str(i) for i in IVERSION)
 PATHOD = "pathod " + VERSION
 MITMPROXY = "mitmproxy " + VERSION