diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31845b1b..5d871d75 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # aws-spot-price changelog
 
+## [1.0.31](https://github.com/hoonoh/aws-spot-price/compare/v1.0.30...v1.0.31) (2022-01-05)
+
+
+### Bug Fixes
+
+* update constants ([#419](https://github.com/hoonoh/aws-spot-price/issues/419)) ([506cbf2](https://github.com/hoonoh/aws-spot-price/commit/506cbf2a80503bdb2df0eb0c2e6e560ef0821a76))
+
 ## [1.0.30](https://github.com/hoonoh/aws-spot-price/compare/v1.0.29...v1.0.30) (2022-01-04)
 
 
diff --git a/package.json b/package.json
index a770029b..2ad443c7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aws-spot-price",
-  "version": "1.0.30",
+  "version": "1.0.31",
   "description": "CLI utility to list current global AWS EC2 Spot Instance prices.",
   "keywords": [
     "aws",