diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69c55c1b..0acf5b16 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 0.11.21 (2021-12-16)
+
+ENHANCEMENTS:
+
+- Update all APIs of `UK8S` (#190)
+
 ## 0.11.20 (2021-12-14)
 
 BUG FIXES:
diff --git a/ucloud/version.py b/ucloud/version.py
index 3b9bfa46..9f006f23 100644
--- a/ucloud/version.py
+++ b/ucloud/version.py
@@ -1 +1 @@
-version = "0.11.20"
+version = "0.11.21"