diff --git a/protobuf/CHANGELOG.md b/protobuf/CHANGELOG.md
index 7b39814..fa3c989 100644
--- a/protobuf/CHANGELOG.md
+++ b/protobuf/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.0
+
+* Graduate package to 1.0. No functional changes.
+
 ## 0.14.4
 * Add `permissiveEnums` option to `mergeFromProto3Json`.
   It will do a case-insensitive matching of enum values ignoring `-` and `_`.
diff --git a/protobuf/pubspec.yaml b/protobuf/pubspec.yaml
index a862d03..c94bcd2 100644
--- a/protobuf/pubspec.yaml
+++ b/protobuf/pubspec.yaml
@@ -1,5 +1,5 @@
 name: protobuf
-version: 0.14.4
+version: 1.0.0
 author: Dart Team <misc@dartlang.org>
 description: >
   Runtime library for protocol buffers support.
diff --git a/protoc_plugin/CHANGELOG.md b/protoc_plugin/CHANGELOG.md
index 7bfe13a..67fa524 100644
--- a/protoc_plugin/CHANGELOG.md
+++ b/protoc_plugin/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 19.0.0+1
+* Updated protobuf dependency to '>=0.14.4 <2.0.0' to allow 1.0.0.
+
 ## 19.0.0
 * Breaking: Generates code that requires at least `protobuf` 0.14.4.
   If protoc_plugin is installed in your path with `pub global activate` you can upgrade with `pub global activate protoc_plugin 19.0.0`
diff --git a/protoc_plugin/pubspec.yaml b/protoc_plugin/pubspec.yaml
index a5d62e5..0e706af 100644
--- a/protoc_plugin/pubspec.yaml
+++ b/protoc_plugin/pubspec.yaml
@@ -1,5 +1,5 @@
 name: protoc_plugin
-version: 19.0.0
+version: 19.0.0+1
 author: Dart Team <misc@dartlang.org>
 description: Protoc compiler plugin to generate Dart code
 homepage: https://github.com/dart-lang/protobuf
@@ -10,7 +10,7 @@
 dependencies:
   fixnum: ^0.10.9
   path: ^1.0.0
-  protobuf: ^0.14.4
+  protobuf: '>=0.14.4 <2.0.0'
   dart_style: ^1.0.6
 
 dev_dependencies: