diff --git a/package-lock.json b/package-lock.json
index 1fa23ac..ca9756f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "japanmesh",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "japanmesh",
-      "version": "1.2.0",
+      "version": "1.2.1",
       "license": "MIT",
       "devDependencies": {
         "@types/jest": "^29.5.12",
diff --git a/package.json b/package.json
index 8c932d7..4530c32 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "japanmesh",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "地域メッシュのコードと緯度経度の変換ユーティリティ",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",