1 files changed, 10 insertions, 0 deletions

diff --git a/README.md b/README.md
index 2047dde..18c3bd4 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,16 @@ Also, include [libra.css](https://github.com/BigCoke233/libra/blob/master/src/li
 <link rel="stylesheet" href="/src/libra.css" />
 ```
 
+Make sure your images all have their `data-libra` attribute.
+
+```html
+<div class="libra">
+  <img data-libra src="1.jpg" />
+  <img data-libra src="2.jpg" />
+  <!-- ... -->
+</div>
+```
+
 ## Development
 
 ```