diff --git a/pyproject.toml b/pyproject.toml
index 051ba2a..c81416b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 [project]
 name = "optype"
 description = "Building blocks for precise & flexible type hints"
-version = "0.9.1"
+version = "0.9.2.dev0"
 authors = [{name = "Joren Hammudoglu", email = "jhammudoglu@gmail.com"}]
 license = "BSD-3-Clause"
 readme = "README.md"
diff --git a/uv.lock b/uv.lock
index b8a2283..8b8c9ef 100644
--- a/uv.lock
+++ b/uv.lock
@@ -286,7 +286,7 @@ wheels = [
 
 [[package]]
 name = "optype"
-version = "0.9.1"
+version = "0.9.2.dev0"
 source = { editable = "." }
 dependencies = [
     { name = "typing-extensions", marker = "python_full_version < '3.13'" },