diff --git a/panopoly-images.css b/panopoly-images.css
index 56d0ed8..b2e7f04 100644
--- a/panopoly-images.css
+++ b/panopoly-images.css
@@ -63,3 +63,15 @@ img.panopoly-image-square {
   margin-left: auto;
   margin-right: auto;
 }
+
+/**
+* Captions
+*/
+div.caption-inner:before,
+div.caption-inner:after {
+    display: table;
+    content: '';
+}
+div.caption-inner:after {
+    clear: both;
+}