diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2136285..8218960 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - Added `CacheSerializer`, `NoopCacheSerializer` and `JSONCacheSerializer`. Changed `CacheBackend`, `InMemoryCache`, `CloudflareCacheBackend` and `DynamoDBCacheBackend` to accept `serializer` initialization option.
 - Fixed schema proxy returning an error when variable defined in an operation is missing from its variables.
+- Fixed query `union` fields support.
 - Improved custom headers handling in `ProxyResolver` and `ProxySchema`.
 - Proxy errors and extensions from upstream.
 - Added fields dependencies configuration option to `ProxySchema`.