diff --git a/VERSION b/VERSION
index fd2a0186..94ff29cc 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.1.0
+3.1.1
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 6c43f27f..2eba007d 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 ### Improve
 
+## 3.1.1
+
+### Improve
+
 * Update Unicode CLDR version to 45 [#674](https://github.com/Riey/kime/issues/674)
 
 ## 3.1.0