diff --git a/motor/__init__.py b/motor/__init__.py
index 05794f37..4e26923c 100644
--- a/motor/__init__.py
+++ b/motor/__init__.py
@@ -14,7 +14,7 @@
 
 """Motor, an asynchronous driver for MongoDB."""
 
-version_tuple = (3, 1, 2)
+version_tuple = (3, 1, 3, 'dev0')
 
 
 def get_version_string():
diff --git a/setup.py b/setup.py
index 2f98a754..f66fa3ba 100644
--- a/setup.py
+++ b/setup.py
@@ -151,7 +151,7 @@ packages = [
 
 setup(
     name="motor",
-    version="3.1.2",
+    version="3.1.3.dev0",
     packages=packages,
     description=description,
     long_description=long_description,