diff --git a/chapter-4-end/package-lock.json b/chapter-4-end/package-lock.json
index 4303a9e..fd0874d 100644
--- a/chapter-4-end/package-lock.json
+++ b/chapter-4-end/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "chapter-4-end",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -80,6 +80,11 @@
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       }
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+    "@babel/parser": {
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+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.21.2.tgz",
+      "integrity": "sha512-URpaIJQwEkEC2T9Kn+Ai6Xe/02iNaVCuT/PtoRz3GPVJVDpPd7mLo+VddTbhCRU9TXqW5mSrQfXZyi8kDKOVpQ=="
+    },
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@@ -163,6 +168,28 @@
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       "dev": true
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+    "@vue/compiler-sfc": {
+      "version": "2.7.14",
+      "resolved": "https://registry.npmjs.org/@vue/compiler-sfc/-/compiler-sfc-2.7.14.tgz",
+      "integrity": "sha512-aNmNHyLPsw+sVvlQFQ2/8sjNuLtK54TC6cuKnVzAY93ks4ZBrvwQSnkkIh7bsbNhum5hJBS00wSDipQ937f5DA==",
+      "requires": {
+        "@babel/parser": "^7.18.4",
+        "postcss": "^8.4.14",
+        "source-map": "^0.6.1"
+      },
+      "dependencies": {
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+          "version": "8.4.21",
+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
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+          "requires": {
+            "nanoid": "^3.3.4",
+            "picocolors": "^1.0.0",
+            "source-map-js": "^1.0.2"
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@@ -546,12 +573,19 @@
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-      "integrity": "sha1-MtU+SFHv3AoRmTts0AB4nXDAUQI=",
+      "version": "0.19.0",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-0.19.0.tgz",
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-        "follow-redirects": "1.4.1",
-        "is-buffer": "1.1.6"
+        "follow-redirects": "1.5.10",
+        "is-buffer": "^2.0.2"
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+          "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.5.tgz",
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+        }
       }
     },
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@@ -2688,7 +2722,7 @@
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-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
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@@ -3076,6 +3110,11 @@
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       }
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+      "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.1.tgz",
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+    },
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-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
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@@ -4761,11 +4800,11 @@
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+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.5.10.tgz",
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-        "debug": "3.1.0"
+        "debug": "=3.1.0"
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@@ -4974,7 +5014,8 @@
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-          "dev": true
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@@ -4989,6 +5030,7 @@
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@@ -5005,6 +5048,7 @@
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@@ -5013,7 +5057,8 @@
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@@ -5030,12 +5075,14 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -5043,22 +5090,26 @@
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           "bundled": true,
           "dev": true,
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@@ -5098,7 +5149,8 @@
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@@ -5152,12 +5205,14 @@
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           "bundled": true,
           "dev": true,
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@@ -5213,6 +5268,7 @@
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+          "optional": true,
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@@ -5225,7 +5281,8 @@
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@@ -5253,6 +5310,7 @@
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           "bundled": true,
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@@ -5263,7 +5321,8 @@
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@@ -5280,6 +5339,7 @@
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@@ -5288,7 +5348,8 @@
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@@ -5300,6 +5361,7 @@
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           "dev": true,
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@@ -5313,7 +5375,8 @@
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@@ -5386,12 +5449,14 @@
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           "bundled": true,
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@@ -5400,22 +5465,17 @@
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@@ -5607,6 +5664,7 @@
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-        "optimist": "0.6.1",
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-            "cliui": "2.1.0",
-            "decamelize": "1.2.0",
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@@ -6821,7 +6887,8 @@
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@@ -8272,50 +8339,50 @@
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