diff --git a/index.md b/index.md
index a728a4d..f09ea7d 100644
--- a/index.md
+++ b/index.md
@@ -20,6 +20,7 @@ Setup docker-renovate garbage collector. Keep docker hosts small.
   * [renovatebot_repositories](#renovatebot_repositories)
   * [renovatebot_service_stopped](#renovatebot_service_stopped)
   * [renovatebot_token](#renovatebot_token)
+  * [renovatebot_version](#renovatebot_version)
 * [Dependencies](#dependencies)
 
 ---
@@ -83,7 +84,7 @@ Docker image to use.
 #### Default value
 
 ```YAML
-renovatebot_image: renovate/renovate:slim
+renovatebot_image: renovate/renovate:{{ renovatebot_version }}
 ```
 
 ### renovatebot_interval
@@ -134,6 +135,14 @@ renovatebot_service_stopped: false
 
 Personal access token for your bot account.
 
+### renovatebot_version
+
+#### Default value
+
+```YAML
+renovatebot_version: slim
+```
+
 ## Dependencies
 
 None.