diff --git a/package-lock.json b/package-lock.json
index 0361a5b..60e0ed1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,6 +26,23 @@
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@@ -77,6 +100,15 @@
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@@ -194,6 +247,18 @@
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@@ -920,6 +1000,27 @@
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@@ -1119,6 +1267,16 @@
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@@ -1350,6 +1587,17 @@
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@@ -2777,6 +3436,15 @@
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@@ -2795,12 +3463,33 @@
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@@ -3037,6 +3726,15 @@
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diff --git a/package.json b/package.json
index 23b0fa9..4f9169d 100644
--- a/package.json
+++ b/package.json
@@ -16,8 +16,10 @@
   "homepage": "https://github.com/ueokande/vim-vixen",
   "devDependencies": {
     "babel-cli": "^6.24.1",
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     "babel-preset-es2015": "^6.24.1",
+    "eslint": "^4.4.1",
     "webpack": "^3.5.3"
   }
 }