Update protoc version (#190)

diff --git a/protoc_plugin/CHANGELOG.md b/protoc_plugin/CHANGELOG.md
index bc3e592..74ed7e3 100644
--- a/protoc_plugin/CHANGELOG.md
+++ b/protoc_plugin/CHANGELOG.md
@@ -1,3 +1,7 @@
++## 15.0.1
+
+* Add test for frozen messages with extension fields and update protobuf dependency to 0.13.0.
+
 ## 15.0.0
 
 *  Breaking change: Changed BuilderInfo call for map fields to include the BuilderInfo object for map entries.
diff --git a/protoc_plugin/pubspec.yaml b/protoc_plugin/pubspec.yaml
index 4c14593..4a80d17 100644
--- a/protoc_plugin/pubspec.yaml
+++ b/protoc_plugin/pubspec.yaml
@@ -1,5 +1,5 @@
 name: protoc_plugin
-version: 15.0.0
+version: 15.0.1
 author: Dart Team <misc@dartlang.org>
 description: Protoc compiler plugin to generate Dart code
 homepage: https://github.com/dart-lang/protobuf