Update versions

spec/pom.xml

diff --git a/spec/pom.xml b/spec/pom.xml
index 2f655b9..e17ff87 100644
--- a/spec/pom.xml
+++ b/spec/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2019, 2022 Contributors to the Eclipse Foundation.
+    Copyright (c) 2019, 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
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.eclipse.ee4j</groupId>
         <artifactId>project</artifactId>
-        <version>1.0.6</version>
+        <version>1.0.9</version>
         <relativePath/>
     </parent>
 
@@ -82,8 +82,8 @@
     <properties>
         <site.output.dir>${project.build.directory}/staging</site.output.dir>
         <maven.site.skip>true</maven.site.skip>
-        <asciidoctorj.version>2.5.2</asciidoctorj.version>
-        <asciidoctorj.pdf.version>1.6.0</asciidoctorj.pdf.version>
+        <asciidoctorj.version>2.5.11</asciidoctorj.version>
+        <asciidoctorj.pdf.version>2.3.13</asciidoctorj.pdf.version>
         <jruby.version>9.3.2.0</jruby.version>
         <!-- status: DRAFT, BETA, etc., or blank for final -->
         <status>DRAFT</status>
@@ -98,7 +98,6 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-enforcer-plugin</artifactId>
-                <version>3.0.0</version>
                 <executions>
                     <execution>
                         <id>enforce-maven</id>
@@ -142,7 +141,6 @@
             <plugin>
                 <groupId>org.asciidoctor</groupId>
                 <artifactId>asciidoctor-maven-plugin</artifactId>
-                <version>2.2.1</version>
                 <dependencies>
                     <dependency>
                         <groupId>org.jruby</groupId>