diff --git a/src/pip/__init__.py b/src/pip/__init__.py
index 38ebba574c9..9de6dc0f2a6 100644
--- a/src/pip/__init__.py
+++ b/src/pip/__init__.py
@@ -4,7 +4,7 @@
     from typing import List, Optional
 
 
-__version__ = "21.0"
+__version__ = "21.1.dev0"
 
 
 def main(args=None):