diff --git a/src/PIL/_version.py b/src/PIL/_version.py
index 1fc7f7334aa..cf5019e8052 100644
--- a/src/PIL/_version.py
+++ b/src/PIL/_version.py
@@ -1,2 +1,2 @@
 # Master version for Pillow
-__version__ = "10.0.0"
+__version__ = "10.1.0.dev0"