diff --git a/src/chapter-01/package-lock.json b/src/chapter-01/package-lock.json
index 2009032..7777303 100644
--- a/src/chapter-01/package-lock.json
+++ b/src/chapter-01/package-lock.json
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@@ -3775,12 +3651,6 @@
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@@ -3934,12 +3810,6 @@
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@@ -4549,6 +4419,15 @@
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-      "integrity": "sha1-xB8vbDn8FtHNF61LXYlhFK5HDVU=",
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@@ -4885,6 +4758,15 @@
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diff --git a/src/chapter-01/package.json b/src/chapter-01/package.json
index 880d8fa..9598703 100644
--- a/src/chapter-01/package.json
+++ b/src/chapter-01/package.json
@@ -11,7 +11,7 @@
   "author": "junyoung.chung@navercorp.com",
   "license": "ISC",
   "devDependencies": {
-    "babel-core": "~6.7.*",
+    "babel-core": "~6.26.*",
     "babel-loader": "~6.2.*",
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     "babel-preset-react": "~6.5.*",