diff --git a/pyproject.toml b/pyproject.toml
index a4c34d7..27af160 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "microdot"
-version = "2.5.1"
+version = "2.5.2.dev0"
 authors = [
     { name = "Miguel Grinberg", email = "miguel.grinberg@gmail.com" },
 ]
diff --git a/src/microdot/__init__.py b/src/microdot/__init__.py
index 04fca2b..5d1e1b0 100644
--- a/src/microdot/__init__.py
+++ b/src/microdot/__init__.py
@@ -1,4 +1,4 @@
 from microdot.microdot import Microdot, Request, Response, abort, redirect, \
     send_file, URLPattern, AsyncBytesIO, iscoroutine  # noqa: F401
 
-__version__ = '2.5.1'
+__version__ = '2.5.2.dev0'