diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 6a0d100f4..47b07efe0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -30,7 +30,7 @@ The quickest way to get started is to copy an existing extension's folder struct
 
 Make sure that your new extension's `build.gradle` file follows the following structure:
 
-```gradle
+```groovy
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 
@@ -65,7 +65,7 @@ Extensions rely on [extensions-lib](https://github.com/tachiyomiorg/extensions-l
 
 [`duktape-stub`](https://github.com/inorichi/tachiyomi-extensions/tree/master/lib/duktape-stub) provides stubs for using Duktape functionality without pulling in the full library. Functionality is bundled into the main Tachiyomi app.
 
-```
+```groovy
 dependencies {
     compileOnly project(':duktape-stub')
 }
@@ -75,19 +75,29 @@ dependencies {
 
 [`lib-ratelimit`](https://github.com/inorichi/tachiyomi-extensions/tree/master/lib/ratelimit) is a library for adding rate limiting functionality as an [OkHttp interceptor](https://square.github.io/okhttp/interceptors/).
 
-```
+```groovy
 dependencies {
     implementation project(':lib-ratelimit')
 }
 ```
 
+#### DataImage library
+
+[`lib-dataimage`](https://github.com/inorichi/tachiyomi-extensions/tree/master/lib/dataimage) is a library for handling [base 64 encoded image data](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs) using an [OkHttp interceptor](https://square.github.io/okhttp/interceptors/).
+
+```groovy
+dependencies {
+    implementation project(':lib-dataimage')
+}
+```
+
 #### Additional dependencies
 
 You may find yourself needing additional functionality and wanting to add more dependencies to your `build.gradle` file. Since extensions are run within the main Tachiyomi app, you can make use of [its dependencies](https://github.com/inorichi/tachiyomi/blob/master/app/build.gradle).
 
 For example, an extension that needs Gson could add the following:
 
-```
+```groovy
 dependencies {
     compileOnly 'com.google.code.gson:gson:2.8.2'
 }