diff --git a/api/pom.xml b/api/pom.xml
index 491bce5..16fdadd 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -3,6 +3,7 @@
 
     Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved.
     Copyright (c) 2016-2019 JSR 371 expert group and contributors
+    Copyright (c) 2020, 2024 Contributors to the Eclipse Foundation
 
     This program and the accompanying materials are made available under the
     terms of the Eclipse Public License v. 2.0, which is available at
@@ -94,10 +95,10 @@
                     <windowtitle>Jakarta MVC ${project.version} API</windowtitle>
                     <bottom><![CDATA[
 Comments to: <a href="mailto:mvc-dev@eclipse.org">mvc-dev@eclipse.org</a>.<br>
-Copyright &#169; 2017, 2020 Eclipse Foundation. All rights reserved.<br>
+Copyright &#169; 2017, 2024 Eclipse Foundation. All rights reserved.<br>
 Use is subject to <a href="{@docRoot}/doc-files/speclicense.html" target="_top">license terms</a>.]]>
                     </bottom>
-                    <source>21</source>
+                    <source>17</source>
                     <docfilessubdirs>true</docfilessubdirs>
                 </configuration>
             </plugin>
diff --git a/pom.xml b/pom.xml
index 07243b5..f70a3eb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
 <!--
 
     Copyright (c) 2017-2018 JSR 371 expert group and contributors
-    Copyright (c) 2020 Contributors to the Eclipse Foundation
+    Copyright (c) 2020, 2024 Contributors to the Eclipse Foundation
 
     This program and the accompanying materials are made available under the
     terms of the Eclipse Public License v. 2.0, which is available at
@@ -80,7 +80,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.release>21</maven.compiler.release>
+        <maven.compiler.release>17</maven.compiler.release>
         <maven.deploy.skip>false</maven.deploy.skip>
         <spec.version>3.0</spec.version>
         <spec.nonFinal>true</spec.nonFinal> <!-- set to false for release -->
diff --git a/spec/pom.xml b/spec/pom.xml
index 483d242..7fd0837 100644
--- a/spec/pom.xml
+++ b/spec/pom.xml
@@ -2,7 +2,7 @@
 <!--
 
     Copyright (c) 2017-2019 JSR 371 expert group and contributors
-    Copyright (c) 2020 Contributors to the Eclipse Foundation
+    Copyright (c) 2020, 2024 Contributors to the Eclipse Foundation
 
     This program and the accompanying materials are made available under the
     terms of the Eclipse Public License v. 2.0, which is available at