diff --git a/src/pip/__init__.py b/src/pip/__init__.py
index 16de4ad0fa2..6791d072015 100644
--- a/src/pip/__init__.py
+++ b/src/pip/__init__.py
@@ -1 +1 @@
-__version__ = "19.0"
+__version__ = "19.1.dev0"