diff --git a/CHANGELOG.md b/CHANGELOG.md
index d856527..886a558 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## 0.4.0 (UNRELEASED)
+## 0.4.0 (2024-07-30)
 
 - Fixed handling of nested variables in objects and lists.
 - Added `queries`, `mutations` and `subscriptions` APIs to `ProxySchema.add_remote_schema`, `ProxySchema.add_schema` and `copy_schema` for creating schemas that are subsets of other, larger schemas.
diff --git a/pyproject.toml b/pyproject.toml
index 6788bda..669537b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
   "Programming Language :: Python :: 3.11",
   "Topic :: Software Development :: Libraries :: Python Modules",
 ]
-version = "0.4.0.dev1"
+version = "0.4.0"
 dependencies = [
   "graphql-core>=3.2.0,<3.3",
   "httpx",