diff --git a/Dockerfile b/Dockerfile
index fbc8d5c..0bb9311 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,19 +1,20 @@
-FROM node:15 as build
+FROM node:16 as build
 
 # https://github.com/jgm/pandoc/releases
 RUN curl -LO https://github.com/jgm/pandoc/releases/download/2.14.0.1/pandoc-2.14.0.1-1-amd64.deb
 RUN dpkg -i pandoc-2.14.0.1-1-amd64.deb
 
 WORKDIR /app
-COPY package.json /app/
-RUN yarn install
 
-COPY themes /app/themes
-COPY source /app/source
-COPY _config.yml /app/
+COPY package.json yarn.lock ./
+RUN yarn install --frozen-lockfile
+
+COPY themes themes
+COPY source source
+COPY _config.yml ./
 RUN yarn build
 
 FROM nginx:stable-alpine as runtime
 
 COPY nginx.conf /etc/nginx/nginx.conf
-COPY --from=build /app/public /var/www/html/
\ No newline at end of file
+COPY --from=build /app/public /var/www/html/
diff --git a/_config.yml b/_config.yml
index a01c519..07094cf 100644
--- a/_config.yml
+++ b/_config.yml
@@ -28,6 +28,9 @@ node_sass:
   precision: 5
   sourceComments: false
 
+sass:
+  outputStyle: expanded
+
 # URL
 ## If your site is put in a subdirectory, set url as 'http://example.com/child' and root as '/child/'
 url: https://uechi.io
@@ -142,4 +145,3 @@ feed:
   atom:
     enable: true
     output: "feed.xml"
-  
diff --git a/package.json b/package.json
index b24b9f0..a498e2f 100644
--- a/package.json
+++ b/package.json
@@ -9,27 +9,27 @@
     "test": "lint-staged"
   },
   "dependencies": {
-    "hexo": "^6.0.0",
-    "hexo-excerpt": "^1.2.1",
+    "hexo": "6.0.0",
+    "hexo-excerpt": "^1.3.0",
     "hexo-feed": "^1.1.0",
-    "hexo-filter-mathjax": "^0.8.0",
+    "hexo-filter-mathjax": "^0.8.1",
     "hexo-generator-archive": "^1.0.0",
     "hexo-generator-category": "^1.0.0",
     "hexo-generator-index": "^2.0.0",
     "hexo-generator-tag": "^1.0.0",
+    "hexo-renderer-dartsass": "^0.1.2",
     "hexo-renderer-ejs": "^2.0.0",
     "hexo-renderer-pandoc": "^0.3.1",
-    "hexo-renderer-sass": "^0.4.0",
-    "hexo-renderer-stylus": "^2.0.0",
+    "hexo-renderer-stylus": "^2.1.0",
     "hexo-server": "^3.0.0",
     "hexo-theme-landscape": "^0.0.3"
   },
   "devDependencies": {
-    "textlint": "^11.9.0",
+    "textlint": "^12.1.1",
     "textlint-filter-rule-whitelist": "^2.0.0",
     "textlint-rule-common-misspellings": "^1.0.1",
     "textlint-rule-no-start-duplicated-conjunction": "^2.0.2",
-    "textlint-rule-preset-japanese": "^6.0.1"
+    "textlint-rule-preset-japanese": "^7.0.0"
   },
   "hexo": {
     "version": "6.0.0"