diff --git a/pyproject.toml b/pyproject.toml
index 9ef1197..6788bda 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
   "Programming Language :: Python :: 3.11",
   "Topic :: Software Development :: Libraries :: Python Modules",
 ]
-version = "0.3.0"
+version = "0.4.0.dev1"
 dependencies = [
   "graphql-core>=3.2.0,<3.3",
   "httpx",