diff --git a/src/stylesheet.css.pp b/src/stylesheet.css.pp
index 254e1ea..f026a1d 100644
--- a/src/stylesheet.css.pp
+++ b/src/stylesheet.css.pp
@@ -47,6 +47,7 @@ a {
 
 img {
     max-width: 100%;
+    height: auto;
 }
 
 a:visited {