diff --git a/package-lock.json b/package-lock.json
index dba4225..dc9d8cd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "json-kifu-format",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "json-kifu-format",
-      "version": "1.3.0",
+      "version": "1.3.1",
       "license": "MIT",
       "dependencies": {
         "shogi.js": "^2.0.5"
diff --git a/package.json b/package.json
index 316a062..411ce47 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "json-kifu-format",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "JSON棋譜フォーマット(JKF)の定義とその関連ライブラリ",
   "main": "dist/json-kifu-format.js",
   "types": "dist/src/main.d.ts",