diff --git a/.node-version b/.node-version
index d3a8b240..41c42177 100644
--- a/.node-version
+++ b/.node-version
@@ -1 +1 @@
-v8.11.1
+v8.11.3
diff --git a/.travis.yml b/.travis.yml
index 5f8f9bb0..bf4ea6ed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - 8.11.1
+  - 8.11.3
   - lts/boron
 
 cache: yarn
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f1b2123..c7d26114 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - Add the basic TypeScript definition ([#40](https://github.com/marp-team/marpit/pull/40))
 - Support heading divider ([#41](https://github.com/marp-team/marpit/pull/41))
+- Upgrade Node LTS and depenent packages ([#42](https://github.com/marp-team/marpit/pull/42))
 
 ## v0.0.8 - 2018-06-28
 
diff --git a/package.json b/package.json
index b4f47cfb..c7c56d61 100644
--- a/package.json
+++ b/package.json
@@ -57,30 +57,30 @@
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-preset-env": "^1.7.0",
     "cheerio": "^1.0.0-rc.2",
-    "coveralls": "^3.0.1",
+    "coveralls": "^3.0.2",
     "cross-env": "^5.2.0",
     "dedent": "^0.7.0",
-    "eslint": "^5.0.1",
+    "eslint": "^5.2.0",
     "eslint-config-airbnb-base": "13.0.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-import": "^2.13.0",
-    "eslint-plugin-prettier": "^2.6.1",
+    "eslint-plugin-prettier": "^2.6.2",
     "jsdoc": "^3.5.5",
     "minami": "^1.2.3",
     "mocha": "^5.2.0",
     "npm-run-all": "^4.1.3",
     "nyc": "^12.0.2",
     "power-assert": "^1.6.0",
-    "prettier": "^1.13.6",
+    "prettier": "^1.13.7",
     "rimraf": "^2.6.2"
   },
   "dependencies": {
     "emoji-regex": "^7.0.0",
     "js-yaml": "^3.12.0",
     "lodash.kebabcase": "^4.1.1",
-    "markdown-it": "^8.4.1",
+    "markdown-it": "^8.4.2",
     "markdown-it-front-matter": "^0.1.2",
-    "postcss": "^6.0.23"
+    "postcss": "^7.0.1"
   },
   "publishConfig": {
     "access": "public"
diff --git a/test/marpit.js b/test/marpit.js
index 1d83f9f8..ad80c3db 100644
--- a/test/marpit.js
+++ b/test/marpit.js
@@ -6,6 +6,9 @@ import MarkdownIt from 'markdown-it'
 import { Marpit, ThemeSet } from '../src/index'
 
 describe('Marpit', () => {
+  // Suppress PostCSS warning while running test
+  const postcssInstance = postcss([() => {}])
+
   describe('#constructor', () => {
     const instance = new Marpit()
 
@@ -96,7 +99,7 @@ describe('Marpit', () => {
         const rendered = instance(true).render('# Hi')
         const $ = cheerio.load(rendered.html, { lowerCaseTags: false })
 
-        return postcss()
+        return postcssInstance
           .process(rendered.css, { from: undefined })
           .then(ret => {
             assert($('svg > foreignObject > section > h1').length === 1)
@@ -116,7 +119,7 @@ describe('Marpit', () => {
       it('has background-image style on section tag when backgroundSyntax is true', () => {
         const $ = cheerio.load(instance(true).render('![bg](test)').html)
 
-        return postcss()
+        return postcssInstance
           .process($('section').attr('style'), { from: undefined })
           .then(ret =>
             ret.root.walkDecls('background-image', decl => {
diff --git a/yarn.lock b/yarn.lock
index 184e1b80..e8b777d9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -855,18 +855,6 @@ boolbase@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
 
-boom@4.x.x:
-  version "4.3.1"
-  resolved "https://registry.yarnpkg.com/boom/-/boom-4.3.1.tgz#4f8a3005cb4a7e3889f749030fd25b96e01d2e31"
-  dependencies:
-    hoek "4.x.x"
-
-boom@5.x.x:
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/boom/-/boom-5.2.0.tgz#5dd9da6ee3a5f302077436290cb717d3f4a54e02"
-  dependencies:
-    hoek "4.x.x"
-
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
@@ -1148,15 +1136,16 @@ core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-coveralls@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/coveralls/-/coveralls-3.0.1.tgz#12e15914eaa29204e56869a5ece7b9e1492d2ae2"
+coveralls@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/coveralls/-/coveralls-3.0.2.tgz#f5a0bcd90ca4e64e088b710fa8dda640aea4884f"
   dependencies:
-    js-yaml "^3.6.1"
+    growl "~> 1.10.0"
+    js-yaml "^3.11.0"
     lcov-parse "^0.0.10"
-    log-driver "^1.2.5"
+    log-driver "^1.2.7"
     minimist "^1.2.0"
-    request "^2.79.0"
+    request "^2.85.0"
 
 cross-env@^5.2.0:
   version "5.2.0"
@@ -1190,12 +1179,6 @@ cross-spawn@^6.0.4, cross-spawn@^6.0.5:
     shebang-command "^1.2.0"
     which "^1.2.9"
 
-cryptiles@3.x.x:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-3.1.2.tgz#a89fbb220f5ce25ec56e8c4aa8a4fd7b5b0d29fe"
-  dependencies:
-    boom "5.x.x"
-
 css-select@~1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/css-select/-/css-select-1.2.0.tgz#2b3a110539c5355f1cd8d314623e870b121ec858"
@@ -1494,9 +1477,9 @@ eslint-plugin-import@^2.13.0:
     read-pkg-up "^2.0.0"
     resolve "^1.6.0"
 
-eslint-plugin-prettier@^2.6.1:
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-2.6.1.tgz#de902b4a66b7bca24296429a59a1cc04020ccbbd"
+eslint-plugin-prettier@^2.6.2:
+  version "2.6.2"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-2.6.2.tgz#71998c60aedfa2141f7bfcbf9d1c459bf98b4fad"
   dependencies:
     fast-diff "^1.1.1"
     jest-docblock "^21.0.0"
@@ -1512,13 +1495,17 @@ eslint-scope@^4.0.0:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
+eslint-utils@^1.3.1:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-1.3.1.tgz#9a851ba89ee7c460346f97cf8939c7298827e512"
+
 eslint-visitor-keys@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#3f3180fb2e291017716acb4c9d6d5b5c34a6a81d"
 
-eslint@^5.0.1:
-  version "5.0.1"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-5.0.1.tgz#109b90ab7f7a736f54e0f341c8bb9d09777494c3"
+eslint@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-5.2.0.tgz#3901ae249195d473e633c4acbc370068b1c964dc"
   dependencies:
     ajv "^6.5.0"
     babel-code-frame "^6.26.0"
@@ -1527,6 +1514,7 @@ eslint@^5.0.1:
     debug "^3.1.0"
     doctrine "^2.1.0"
     eslint-scope "^4.0.0"
+    eslint-utils "^1.3.1"
     eslint-visitor-keys "^1.0.0"
     espree "^4.0.0"
     esquery "^1.0.1"
@@ -1534,8 +1522,8 @@ eslint@^5.0.1:
     file-entry-cache "^2.0.0"
     functional-red-black-tree "^1.0.1"
     glob "^7.1.2"
-    globals "^11.5.0"
-    ignore "^3.3.3"
+    globals "^11.7.0"
+    ignore "^4.0.2"
     imurmurhash "^0.1.4"
     inquirer "^5.2.0"
     is-resolvable "^1.1.0"
@@ -1926,7 +1914,7 @@ globals@^11.1.0:
   version "11.5.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.5.0.tgz#6bc840de6771173b191f13d3a9c94d441ee92642"
 
-globals@^11.5.0:
+globals@^11.7.0:
   version "11.7.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.7.0.tgz#a583faa43055b1aca771914bf68258e2fc125673"
 
@@ -1949,7 +1937,7 @@ graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4, graceful-fs@^4.1.9:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
-growl@1.10.5:
+growl@1.10.5, "growl@~> 1.10.0":
   version "1.10.5"
   resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
 
@@ -2029,23 +2017,10 @@ has@^1.0.1:
   dependencies:
     function-bind "^1.0.2"
 
-hawk@~6.0.2:
-  version "6.0.2"
-  resolved "https://registry.yarnpkg.com/hawk/-/hawk-6.0.2.tgz#af4d914eb065f9b5ce4d9d11c1cb2126eecc3038"
-  dependencies:
-    boom "4.x.x"
-    cryptiles "3.x.x"
-    hoek "4.x.x"
-    sntp "2.x.x"
-
 he@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
 
-hoek@4.x.x:
-  version "4.2.1"
-  resolved "https://registry.yarnpkg.com/hoek/-/hoek-4.2.1.tgz#9634502aa12c445dd5a7c5734b572bb8738aacbb"
-
 home-or-tmp@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/home-or-tmp/-/home-or-tmp-2.0.0.tgz#e36c3f2d2cae7d746a857e38d18d5f32a7882db8"
@@ -2088,9 +2063,9 @@ ignore-walk@^3.0.1:
   dependencies:
     minimatch "^3.0.4"
 
-ignore@^3.3.3:
-  version "3.3.8"
-  resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.8.tgz#3f8e9c35d38708a3a7e0e9abb6c73e7ee7707b2b"
+ignore@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.2.tgz#0a8dd228947ec78c2d7f736b1642a9f7317c1905"
 
 imurmurhash@^0.1.4:
   version "0.1.4"
@@ -2443,13 +2418,6 @@ js-yaml@^3.11.0, js-yaml@^3.12.0:
     argparse "^1.0.7"
     esprima "^4.0.0"
 
-js-yaml@^3.6.1:
-  version "3.11.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.11.0.tgz#597c1a8bd57152f26d622ce4117851a51f5ebaef"
-  dependencies:
-    argparse "^1.0.7"
-    esprima "^4.0.0"
-
 js2xmlparser@~3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/js2xmlparser/-/js2xmlparser-3.0.0.tgz#3fb60eaa089c5440f9319f51760ccd07e2499733"
@@ -2626,7 +2594,7 @@ lodash@^4.15.0, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.3.0:
   version "4.17.10"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.10.tgz#1b7793cf7259ea38fb3661d4d38b3260af8ae4e7"
 
-log-driver@^1.2.5:
+log-driver@^1.2.7:
   version "1.2.7"
   resolved "https://registry.yarnpkg.com/log-driver/-/log-driver-1.2.7.tgz#63b95021f0702fedfa2c9bb0a24e7797d71871d8"
 
@@ -2665,9 +2633,9 @@ markdown-it-front-matter@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/markdown-it-front-matter/-/markdown-it-front-matter-0.1.2.tgz#e50bf56e77e6a4f5ac4ffa894d4d45ccd9896b20"
 
-markdown-it@^8.4.1:
-  version "8.4.1"
-  resolved "https://registry.yarnpkg.com/markdown-it/-/markdown-it-8.4.1.tgz#206fe59b0e4e1b78a7c73250af9b34a4ad0aaf44"
+markdown-it@^8.4.2:
+  version "8.4.2"
+  resolved "https://registry.yarnpkg.com/markdown-it/-/markdown-it-8.4.2.tgz#386f98998dc15a37722aa7722084f4020bdd9b54"
   dependencies:
     argparse "^1.0.7"
     entities "~1.1.1"
@@ -3249,9 +3217,9 @@ posix-character-classes@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
 
-postcss@^6.0.23:
-  version "6.0.23"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
+postcss@^7.0.1:
+  version "7.0.1"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.1.tgz#db20ca4fc90aa56809674eea75864148c66b67fa"
   dependencies:
     chalk "^2.4.1"
     source-map "^0.6.1"
@@ -3353,9 +3321,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@^1.13.6:
-  version "1.13.6"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.6.tgz#00ae0b777ad92f81a9e7a1df2f0470b6dab0cb44"
+prettier@^1.13.7:
+  version "1.13.7"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.7.tgz#850f3b8af784a49a6ea2d2eaa7ed1428a34b7281"
 
 private@^0.1.6, private@^0.1.8:
   version "0.1.8"
@@ -3545,9 +3513,9 @@ repeating@^2.0.0:
   dependencies:
     is-finite "^1.0.0"
 
-request@^2.79.0:
-  version "2.85.0"
-  resolved "https://registry.yarnpkg.com/request/-/request-2.85.0.tgz#5a03615a47c61420b3eb99b7dba204f83603e1fa"
+request@^2.85.0:
+  version "2.87.0"
+  resolved "https://registry.yarnpkg.com/request/-/request-2.87.0.tgz#32f00235cd08d482b4d0d68db93a829c0ed5756e"
   dependencies:
     aws-sign2 "~0.7.0"
     aws4 "^1.6.0"
@@ -3557,7 +3525,6 @@ request@^2.79.0:
     forever-agent "~0.6.1"
     form-data "~2.3.1"
     har-validator "~5.0.3"
-    hawk "~6.0.2"
     http-signature "~1.2.0"
     is-typedarray "~1.0.0"
     isstream "~0.1.2"
@@ -3567,7 +3534,6 @@ request@^2.79.0:
     performance-now "^2.1.0"
     qs "~6.5.1"
     safe-buffer "^5.1.1"
-    stringstream "~0.0.5"
     tough-cookie "~2.3.3"
     tunnel-agent "^0.6.0"
     uuid "^3.1.0"
@@ -3758,12 +3724,6 @@ snapdragon@^0.8.1:
     source-map-resolve "^0.5.0"
     use "^3.1.0"
 
-sntp@2.x.x:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/sntp/-/sntp-2.1.0.tgz#2c6cec14fedc2222739caf9b5c3d85d1cc5a2cc8"
-  dependencies:
-    hoek "4.x.x"
-
 source-map-resolve@^0.5.0:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.1.tgz#7ad0f593f2281598e854df80f19aae4b92d7a11a"
@@ -3921,10 +3881,6 @@ stringifier@^1.3.0:
     traverse "^0.6.6"
     type-name "^2.0.1"
 
-stringstream@~0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"
-
 strip-ansi@^3.0.0, strip-ansi@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"