diff --git a/docker/version.py b/docker/version.py
index 3a5bc9c8..4cec7446 100644
--- a/docker/version.py
+++ b/docker/version.py
@@ -1,2 +1,2 @@
-version = "1.2.0"
+version = "1.2.1-dev"
 version_info = tuple([int(d) for d in version.replace("-dev", "").split(".")])