Fix version.
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index ad451bd..eb87396 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -45,7 +45,7 @@
   </properties>
 
   <body>
-    <release version="2.13.0" date="2021-MM-DD" description="Java 8 required.">
+    <release version="2.12.0" date="2021-MM-DD" description="Java 8 required.">
       <!-- FIX -->
       <action dev="ggregory" type="fix" due-to="Gary Gregory">
         Fix Javadoc links to the JRE Javadoc 8.