diff --git a/src/epub/content.opf b/src/epub/content.opf
index d3fd985..257eca3 100644
--- a/src/epub/content.opf
+++ b/src/epub/content.opf
@@ -24,7 +24,7 @@
 		<meta property="schema:accessibilityFeature">tableOfContents</meta>
 		<meta property="schema:accessibilityFeature">unlocked</meta>
 		<meta property="schema:accessibilityHazard">none</meta>
-		<meta property="schema:accessibilitySummary">This publication conforms to WCAG 2.1 Level AA.</meta>
+		<meta property="schema:accessibilitySummary">This publication conforms to WCAG 2.2 Level AA.</meta>
 		<link href="onix.xml" media-type="application/xml" properties="onix" rel="record"/>
 		<dc:title id="title">Triplanetary</dc:title>
 		<meta property="file-as" refines="#title">Triplanetary</meta>