diff --git a/package-lock.json b/package-lock.json
index 351acef..fde73d9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,6 @@
         "@kintone/rest-api-client": "^5.7.3",
         "angular-expressions": "^1.4.3",
         "clsx": "^2.1.1",
-        "core-js": "^3.42.0",
         "dayjs": "^1.11.13",
         "docxtemplater": "^3.63.2",
         "file-saver": "^2.0.5",
diff --git a/package.json b/package.json
index 1d441d1..83e924a 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,6 @@
     "@kintone/rest-api-client": "^5.7.3",
     "angular-expressions": "^1.4.3",
     "clsx": "^2.1.1",
-    "core-js": "^3.42.0",
     "dayjs": "^1.11.13",
     "docxtemplater": "^3.63.2",
     "file-saver": "^2.0.5",