diff --git a/book/pom.xml b/book/pom.xml
index 178cce9b..1c201615 100644
--- a/book/pom.xml
+++ b/book/pom.xml
@@ -29,7 +29,7 @@ along with nmw-oss-parent.  If not, see <https://www.gnu.org/licenses/>.
   </parent>
 
   <groupId>com.newmediaworks</groupId><artifactId>nmw-oss-parent-book</artifactId><version>1.20.0-SNAPSHOT</version>
-  <packaging>bundle</packaging>
+  <packaging>jar</packaging>
 
   <properties>
     <module.name>com.newmediaworks.oss.parent.book</module.name>
@@ -150,6 +150,14 @@ along with nmw-oss-parent.  If not, see <https://www.gnu.org/licenses/>.
               </instructions>
             </configuration>
           </plugin>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId><artifactId>maven-jar-plugin</artifactId>
+            <configuration>
+              <excludes>
+                <exclude>**/module-info.class</exclude>
+              </excludes>
+            </configuration>
+          </plugin>
         </plugins>
       </build>
     </profile>
diff --git a/book/src/main/resources-filtered/META-INF/resources/parent/changelog.jspx b/book/src/main/resources-filtered/META-INF/resources/parent/changelog.jspx
index cbd61d04..c18dddc6 100644
--- a/book/src/main/resources-filtered/META-INF/resources/parent/changelog.jspx
+++ b/book/src/main/resources-filtered/META-INF/resources/parent/changelog.jspx
@@ -37,7 +37,7 @@ along with nmw-oss-parent.  If not, see <https://www.gnu.org/licenses/>.
     shortTitle="Changelog"
     tocLevels="1"
     datePublished="2019-05-24T19:05:12-05:00"
-    dateModified="2023-08-16T21:22:51Z"
+    dateModified="2023-08-17T20:46:40Z"
   >
     <c:if test="${fn:endsWith('@{project.version}', '-SNAPSHOT') and !fn:endsWith('@{project.version}', '-POST-SNAPSHOT')}">
       <changelog:release
@@ -54,6 +54,31 @@ along with nmw-oss-parent.  If not, see <https://www.gnu.org/licenses/>.
             via <ao:a href="https://github.com/git-commit-id/git-commit-id-maven-plugin">git-commit-id-maven-plugin</ao:a>.
           </li>
           <li>Builds now require Java 11 or newer.</li>
+          <li>
+            Builds now require Maven 3.9.0 or newer for
+            <ao:a href="https://maven.apache.org/guides/introduction/introduction-to-profiles.html">profile activation by packaging</ao:a>.
+          </li>
+          <li>
+            <p>
+              Using packaging=jar instead of packaging=bundle for all jar projects.
+              OSGI manifest entries are still added, however, as documented at
+              <ao:a href="https://felix.apache.org/documentation/subprojects/apache-felix-maven-bundle-plugin-bnd.html#_adding_osgi_metadata_to_existing_projects_without_changing_the_packaging_type">
+                Adding OSGi metadata to existing projects without changing the packaging type
+              </ao:a>.
+              This has the side effect that projects that were previously packaging=jar will now have
+              OSGI manifest entries added.  None of our projects were previously of the jar packaging.
+            </p>
+            <p>
+              This change is required since <ao:a href="https://felix.apache.org/documentation/subprojects/apache-felix-maven-bundle-plugin-bnd.html">maven-bundle-plugin</ao:a>
+              has been <ao:a href="https://github.com/FasterXML/jackson-databind/issues/3680">adding entries with a constant and hard-coded timestamp of 1980-02-01</ao:a>.
+            </p>
+            <p>
+              These constant timestamps are incompatible with the automatic lastModified parameters added by
+              <ao:a href="https://oss.aoapps.com/servlet-last-modified/">AO Servlet Last Modified</ao:a> when the resource
+              is contained in a JAR file within <code>WEB-INF/lib</code>.  This has resulted in browsers using
+              out-of-date cached content.
+            </p>
+          </li>
         </ul>
       </changelog:release>
     </c:if>
diff --git a/pom.xml b/pom.xml
index 4a5a3540..33fa54d3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -120,7 +120,10 @@ along with nmw-oss-parent.  If not, see <https://www.gnu.org/licenses/>.
     <!-- Google Analytics tracking code for the javadocs -->
     <google.analytics.trackingId>UA-177004-2</google.analytics.trackingId>
     <!--
-      The Java module name, defaulting to the value previously used for "Bundle-SymbolicName" in Java < 9. All projects should set this to match the module name defined in "module-info.java". Furthermore, projects without "module-info.java" should also add the "Automatic-Module-Name" manifest entry. -->
+      The Java module name, defaulting to the value previously used for "Bundle-SymbolicName" in Java < 9. All projects
+      should set this to match the module name defined in "module-info.java". Furthermore, projects without
+      "module-info.java" should also add the "Automatic-Module-Name" manifest entry.
+    -->
     <module.name>${project.groupId}.${project.artifactId}</module.name>
     <!-- Default bundle resources-filtered, may be overridden as part of "alt.build.dir" property -->
     <bundle.resources-filtered>target/resources-filtered</bundle.resources-filtered>
@@ -1618,8 +1621,8 @@ along with nmw-oss-parent.  If not, see <https://www.gnu.org/licenses/>.
             <configuration>
               <rules>
                 <requireMavenVersion>
-                  <message>Maven &gt;= 3.6.3 required by maven-help-plugin</message>
-                  <version>[3.6.3,)</version>
+                  <message>Maven &gt;= 3.9.0 required for profile activation by packaging</message>
+                  <version>[3.9.0,)</version>
                 </requireMavenVersion>
               </rules>
             </configuration>
@@ -2006,6 +2009,35 @@ along with nmw-oss-parent.  If not, see <https://www.gnu.org/licenses/>.
         </plugins>
       </build>
     </profile>
+    <!-- See https://felix.apache.org/documentation/subprojects/apache-felix-maven-bundle-plugin-bnd.html#_adding_osgi_metadata_to_existing_projects_without_changing_the_packaging_type -->
+    <profile>
+      <id>packaging-jar</id>
+      <activation><property><name>packaging</name><value>jar</value></property></activation>
+      <build>
+        <pluginManagement>
+          <plugins>
+            <plugin>
+              <groupId>org.apache.maven.plugins</groupId><artifactId>maven-jar-plugin</artifactId>
+              <configuration>
+                <archive>
+                  <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
+                </archive>
+              </configuration>
+            </plugin>
+          </plugins>
+        </pluginManagement>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.felix</groupId><artifactId>maven-bundle-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>bundle-manifest</id><phase>process-classes</phase><goals><goal>manifest</goal></goals>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
     <!-- Fix the scroll position in Java 11 javadoc -->
     <profile>
       <id>nmw-javadoc-resources-addStylesheet-java-11</id>