diff --git a/Dockerfile b/Dockerfile
index 8b3fe3e..be54356 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,7 @@
 FROM etherpad/etherpad:1.8.6
 
-RUN npm install ep_prompt_for_name ep_comments_page ep_markdown
\ No newline at end of file
+RUN npm install \
+	ep_prompt_for_name \
+	ep_comments_page \
+	ep_markdown \
+	ep_headings2
\ No newline at end of file