diff --git a/USAGE.md b/USAGE.md
index 4215fb3..8cfc7b9 100644
--- a/USAGE.md
+++ b/USAGE.md
@@ -12,7 +12,7 @@ curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
 sudo apt-get install -y nodejs
 sudo apt-get install -y build-essential
 sudo apt install -y npm pkg-config libcairo2-dev
-npm install gitbook git+https://github.com/SteveClement/plugin-autocover.git gitbook-plugin-github gitbook-plugin-toc gitbook-plugin-anchors
+npm install gitbook git+https://github.com/SteveClement/plugin-autocover.git gitbook-plugin-github gitbook-plugin-toc gitbook-plugin-anchors gitbook-plugin-image-class
 sudo npm install gitbook-cli -g
 gitbook install
 ```
@@ -106,7 +106,7 @@ brew install pkg-config cairo pango libpng jpeg giflib
 Installing gitbook and all dependencies wants to look like this (Tested on *macOS 11.13.3*):
 
 ```bash
-npm install gitbook git+https://github.com/SteveClement/plugin-autocover.git gitbook-plugin-github gitbook-plugin-toc gitbook-plugin-anchors
+npm install gitbook git+https://github.com/SteveClement/plugin-autocover.git gitbook-plugin-github gitbook-plugin-toc gitbook-plugin-anchors gitbook-plugin-image-class
 npm install gitbook-cli -g
 gitbook install
 ```
diff --git a/book.json b/book.json
index 97bb395..55fa514 100644
--- a/book.json
+++ b/book.json
@@ -3,7 +3,7 @@
     "description": "User guide of MISP Malware Information Sharing Platform, a Threat Sharing Platform.",
     "language": "en",
     "author": "MISP Contributors",
-    "plugins": ["autocover", "github", "toc", "anchors", "alerts", "advanced-emoji"],
+    "plugins": ["autocover", "github", "toc", "anchors", "alerts", "advanced-emoji", "image-class"],
     "links": { "sidebar": {        "MISP @ GitHub": "https://github.com/MISP/MISP", "PDF Format": "https://www.circl.lu/doc/misp/book.pdf" }},
     "pluginsConfig": {
         "github": {