diff --git a/pom.xml b/pom.xml
index 8b0e091..7b20c1b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,6 +25,7 @@
 
   <properties>
     <io7m.api.previousVersion>2.0.0</io7m.api.previousVersion>
+    <io7m.java.targetJavaVersion>21</io7m.java.targetJavaVersion>
   </properties>
 
   <licenses>