diff --git a/pymongo/_version.py b/pymongo/_version.py
index 63e3b1d6ff..bf52d4b516 100644
--- a/pymongo/_version.py
+++ b/pymongo/_version.py
@@ -17,7 +17,7 @@
 
 from typing import Tuple, Union
 
-version_tuple: Tuple[Union[int, str], ...] = (4, 6, 2)
+version_tuple: Tuple[Union[int, str], ...] = (4, 6, 3, ".dev0")
 
 
 def get_version_string() -> str: