diff --git a/README.md b/README.md
index d6d59c7..0887914 100644
--- a/README.md
+++ b/README.md
@@ -503,6 +503,11 @@ operating systems.  All image paths not starting with `http://` or `https://`
 are assumed to refer to local image files (files on your machine), and will
 result in errors if these files are not found.
 
+Use the [attribute extension](https://python-markdown.github.io/extensions/attr_list/)
+in markdown to alter the image size:
+```
+![alt_text](image_file){: width="100px"}
+```
 
 ### LaTeX
 
diff --git a/text2qti/markdown.py b/text2qti/markdown.py
index abcdbb9..b8e0d0e 100644
--- a/text2qti/markdown.py
+++ b/text2qti/markdown.py
@@ -40,6 +40,7 @@
     markdown.extensions.footnotes.makeExtension(),
     markdown.extensions.tables.makeExtension(),
     markdown.extensions.md_in_html.makeExtension(),
+    markdown.extensions.attr_list.makeExtension(),
 ]
 from markdown.inlinepatterns import ImageInlineProcessor, IMAGE_LINK_RE