diff --git a/smart_open/version.py b/smart_open/version.py
index 8544daac..2a61aaed 100644
--- a/smart_open/version.py
+++ b/smart_open/version.py
@@ -1,4 +1,4 @@
-__version__ = '7.0.3'
+__version__ = '7.0.3.dev0'
 
 
 if __name__ == '__main__':