diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76b8ed2f..95c6085e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+#### 3.0.1+1 - 2021-10-14
+
+  * Add documentation to `Optional` suggesting that adding new uses be avoided
+    and existing uses should be migrated to nullable types in codebases where
+    non-null by default has been enabled.
+
 #### 3.0.1 - 2021-04-06
 
   * Fix: Eliminate null check error on removal of root node of
diff --git a/lib/src/core/optional.dart b/lib/src/core/optional.dart
index 8a3f2cc1..1e51bdec 100644
--- a/lib/src/core/optional.dart
+++ b/lib/src/core/optional.dart
@@ -19,9 +19,10 @@ import 'dart:collection';
 /// Use Optional as an alternative to allowing fields, parameters or return
 /// values to be null. It signals that a value is not required and provides
 /// convenience methods for dealing with the absent case.
-//
-// TODO(cbracken): Consider making this Optional<T extends Object>.
-// See: https://github.com/google/quiver-dart/issues/666
+///
+/// With the introduction of non-null by default in Dart SDK 2.12, developers
+/// should avoid adding more uses of this type. Existing users should migrate
+/// away from the `Optional` type to types marked nullable: `T?`.
 class Optional<T> extends IterableBase<T> {
   /// Constructs an empty Optional.
   const Optional.absent() : _value = null;
diff --git a/pubspec.yaml b/pubspec.yaml
index 0fe16cf5..6aa0af90 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,7 +3,7 @@ description: >-
   Quiver is a set of utility libraries for Dart that makes using many Dart
   libraries easier and more convenient, or adds additional functionality.
 repository: https://github.com/google/quiver-dart
-version: 3.0.1
+version: 3.0.1+1
 
 environment:
   sdk: '>=2.12.0-0 <3.0.0'