diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index cb493e52..26cdcd61 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -11,6 +11,7 @@ Development
 -----------
 - Add ``CallableDelegate`` provider.
 - Add ``FactoryDelegate`` provider.
+- Add ``SingletonDelegate`` provider.
 
 3.5.0
 -----