diff --git a/.github/workflows/honkit.yml b/.github/workflows/honkit.yml
index 8ec2d23..3a1ca46 100644
--- a/.github/workflows/honkit.yml
+++ b/.github/workflows/honkit.yml
@@ -11,19 +11,19 @@ jobs:
         - name: Install honkit
           run: |
               sudo apt-get -y install libgif-dev calibre npm nodejs
-			  sudo npm config set strict-ssl false
-			  sudo npm cache clean -f
-			  sudo npm install -g n
-			  sudo n stable
-			  sudo npm update -g
-			  npm install honkit --save-dev
-			  npm install gitbook-plugin-github
-			  npm install gitbook-plugin-atoc
-			  npm install gitbook-plugin-anchors
-			  npm install gitbook-plugin-image-class
-			  npm install gitbook-plugin-codesnippet
-			  npm install gitbook-plugin-last-modified
-			  npm install gitbook-plugin-sitemap
-			  npm install gitbook-plugin-advanced-emoji
-			  npm install gitbook-plugin-image-class
+              sudo npm config set strict-ssl false
+              sudo npm cache clean -f
+              sudo npm install -g n
+              sudo n stable
+              sudo npm update -g
+              npm install honkit --save-dev
+              npm install gitbook-plugin-github
+              npm install gitbook-plugin-atoc
+              npm install gitbook-plugin-anchors
+              npm install gitbook-plugin-image-class
+              npm install gitbook-plugin-codesnippet
+              npm install gitbook-plugin-last-modified
+              npm install gitbook-plugin-sitemap
+              npm install gitbook-plugin-advanced-emoji
+              npm install gitbook-plugin-image-class
               npx honkit build