diff --git a/pymongo/__init__.py b/pymongo/__init__.py
index 9012d8479..88227a577 100644
--- a/pymongo/__init__.py
+++ b/pymongo/__init__.py
@@ -99,7 +99,7 @@ See https://docs.mongodb.com/manual/tutorial/manage-the-database-profiler
    Deprecated
 """
 
-version_tuple = (3, 13, 0)
+version_tuple = (3, 13, 1, ".dev0")
 
 
 def get_version_string():
diff --git a/setup.py b/setup.py
index 591be1c7c..88adcddc6 100755
--- a/setup.py
+++ b/setup.py
@@ -45,7 +45,7 @@ except ImportError:
     except ImportError:
         _HAVE_SPHINX = False
 
-version = "3.13.0"
+version = "3.13.1.dev0"
 
 f = open("README.rst")
 try: