diff --git a/rophako/model/comment.py b/rophako/model/comment.py
index c1e2791..b811b67 100644
--- a/rophako/model/comment.py
+++ b/rophako/model/comment.py
@@ -181,9 +181,6 @@ def format_message(message):
     # Comments use Markdown formatting, and HTML tags are escaped by default.
     message = render_markdown(message)
 
-    # Don't allow commenters to use images.
-    message = re.sub(r'<img.+?/>', '', message)
-
     # Process emoticons.
     message = Emoticons.render(message)
     return message
diff --git a/rophako/www/smoke/style.css b/rophako/www/smoke/style.css
index 1930e5d..12ae1c6 100644
--- a/rophako/www/smoke/style.css
+++ b/rophako/www/smoke/style.css
@@ -77,6 +77,12 @@ pre, code {
     font-size: 10pt;
 }
 
+/* Use responsive images in Markdown code. */
+.markdown img {
+	max-width: 100%;
+	height: auto;
+}
+
 /*********************
  * Classes used by core Rophako pages. You'll want to
  * implement these in your custom layout.