diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32e42b35..652a2d9b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 0.21.16 (2021-08-31)
+
+ENHANCEMENTS:
+
+- Update all APIs of `UCDN` (#288)
+- Update all APIs of `ISMS` (#287)
+
 ## 0.21.15 (2021-08-30)
 
 ENHANCEMENTS:
diff --git a/ucloud/version/version.go b/ucloud/version/version.go
index 531b9dc5..2ac560ff 100644
--- a/ucloud/version/version.go
+++ b/ucloud/version/version.go
@@ -1,3 +1,3 @@
 package version
 
-const Version = "0.21.15"
+const Version = "0.21.16"