diff --git a/lithic/_version.py b/lithic/_version.py
index 7b2b5339..983af2cc 100644
--- a/lithic/_version.py
+++ b/lithic/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless.
 
 __title__ = "lithic"
-__version__ = "0.3.1"
+__version__ = "0.4.0"
diff --git a/pyproject.toml b/pyproject.toml
index 1c40e080..f698ef37 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "lithic"
-version = "0.3.1"
+version = "0.4.0"
 description = "Client library for the lithic API"
 readme = "README.md"
 authors = ["Lithic <sdk-feedback@lithic.com>"]