diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61d0e1f62eaaed9596e79edae084fd1b0ac8a51e..318a3f2ca7fb726b1b6a5b39e0be51cc61a39b8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.0.0-pre
+
+- Migrate to NNBD
+
 ## 1.4.0-pre
 
 - Object's ACL Query; Include object's ACL in stat [#23](https://github.com/xtyxtyx/minio-dart/pull/23), thanks [@rtgnx](https://github.com/rtgnx)
diff --git a/pubspec.yaml b/pubspec.yaml
index 2a18f87b42c4281e65bccc2b7f683e431df8e8c1..10caa0a7a50e9c72a8fc78081df259e78d20d304 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: minio
 description: Unofficial MinIO Dart Client SDK that provides simple APIs to access any Amazon S3 compatible object storage server.
-version: 1.4.0-pre
+version: 2.0.0-pre
 homepage: https://github.com/xtyxtyx/minio-dart
 issue_tracker: https://github.com/xtyxtyx/minio-dart/issues