diff --git a/frontend/package-lock.json b/frontend/package-lock.json
deleted file mode 100644
index b2b2d4aa..00000000
--- a/frontend/package-lock.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "name": "doccano",
-  "version": "1.0.0",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "@vuejs-community/vue-filter-date-format": {
-      "version": "1.6.3",
-      "resolved": "https://registry.npmjs.org/@vuejs-community/vue-filter-date-format/-/vue-filter-date-format-1.6.3.tgz",
-      "integrity": "sha512-fUjAAI/1qzJPR6AYoK00TBA6/aRYKTXjLY/rSYsWV4G5nwywKfrpOYOJi5exWyzozohyV6nrzliDlWcl32+IPg=="
-    },
-    "@vuejs-community/vue-filter-date-parse": {
-      "version": "1.1.6",
-      "resolved": "https://registry.npmjs.org/@vuejs-community/vue-filter-date-parse/-/vue-filter-date-parse-1.1.6.tgz",
-      "integrity": "sha512-OzeiL5wrq+5+sw9hJfcfaIxcG953lpe37Lf0JnRKzVvfBRTHX2t8SIVxtDmgLhSGoGx9B4bGbpv4NaIqeEofXA=="
-    }
-  }
-}
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index f17ed285..00000000
--- a/package-lock.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-    "requires": true,
-    "lockfileVersion": 1,
-    "dependencies": {
-        "@vuejs-community/vue-filter-date-format": {
-            "version": "1.6.3",
-            "resolved": "https://registry.npmjs.org/@vuejs-community/vue-filter-date-format/-/vue-filter-date-format-1.6.3.tgz",
-            "integrity": "sha512-fUjAAI/1qzJPR6AYoK00TBA6/aRYKTXjLY/rSYsWV4G5nwywKfrpOYOJi5exWyzozohyV6nrzliDlWcl32+IPg=="
-        },
-        "@vuejs-community/vue-filter-date-parse": {
-            "version": "1.1.6",
-            "resolved": "https://registry.npmjs.org/@vuejs-community/vue-filter-date-parse/-/vue-filter-date-parse-1.1.6.tgz",
-            "integrity": "sha512-OzeiL5wrq+5+sw9hJfcfaIxcG953lpe37Lf0JnRKzVvfBRTHX2t8SIVxtDmgLhSGoGx9B4bGbpv4NaIqeEofXA=="
-        }
-    }
-}