Index: wp-content/themes/twentythirteen/style.css
===================================================================
--- wp-content/themes/twentythirteen/style.css	(revision 23827)
+++ wp-content/themes/twentythirteen/style.css	(working copy)
@@ -262,7 +262,8 @@
 }
 
 blockquote cite,
-blockquote small {
+blockquote small,
+figcaption {
 	font-size: 14px;
 	font-weight: normal;
 	text-transform: uppercase;
@@ -1166,7 +1167,8 @@
 }
 
 .entry-content blockquote cite,
-.entry-content blockquote small {
+.entry-content blockquote small,
+.entry-content figcaption {
 	font-size: 16px;
 }
 
@@ -1755,14 +1757,16 @@
 
 .format-quote .quote-caption,
 .format-quote .entry-content small,
-.format-quote .entry-content cite {
+.format-quote .entry-content cite,
+.format-quote .entry-content figcaption {
 	display: block;
 	font-size: 16px;
 	margin-top: 20px;
 }
 
 .format-quote .quote-caption small,
-.format-quote .quote-caption cite {
+.format-quote .quote-caption cite,
+.format-quote .quote-caption figcaption {
 	display: inline;
 	margin: auto;
 }
@@ -3084,7 +3088,8 @@
 	}
 
 	.format-quote .entry-content small,
-	.format-quote .entry-content cite {
+	.format-quote .entry-content cite,
+	.format-quote .entry-content figcaption {
 		font-size: 13px;
 	}