diff --git a/CHANGES.rst b/CHANGES.rst
index 0665445a..d1074d33 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,9 @@
+Version 2.1.5
+-------------
+
+Unreleased
+
+
 Version 2.1.4
 -------------
 
diff --git a/src/markupsafe/__init__.py b/src/markupsafe/__init__.py
index 2f401a81..1e0f0228 100644
--- a/src/markupsafe/__init__.py
+++ b/src/markupsafe/__init__.py
@@ -13,7 +13,7 @@ def __html__(self) -> str:
     _P = te.ParamSpec("_P")
 
 
-__version__ = "2.1.4"
+__version__ = "2.1.5.dev"
 
 
 def _simple_escaping_wrapper(func: "t.Callable[_P, str]") -> "t.Callable[_P, Markup]":