diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47477cd..6b63bef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 1.4.0
+
+- Official update.
+- Support national holiday api.
+
 ## 1.3.0
 
 - Official update.
diff --git a/pubspec.yaml b/pubspec.yaml
index de87bce..32823f6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dart_kenall
 description: Unofficially Kenall API Client.
-version: 1.3.0
+version: 1.4.0
 homepage: https://kenall.jp
 
 environment: