diff --git a/specification/pom.xml b/specification/pom.xml
index 9343c003..e3290bab 100644
--- a/specification/pom.xml
+++ b/specification/pom.xml
@@ -49,7 +49,7 @@
         
         <asciidoctor.maven.plugin.version>3.0.0</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.13</asciidoctorj.version>
-        <asciidoctorj.pdf.version>2.3.17</asciidoctorj.pdf.version>
+        <asciidoctorj.pdf.version>2.3.18</asciidoctorj.pdf.version>
         <jruby.version>9.4.8.0</jruby.version> 
 
         <!-- status: DRAFT, BETA, etc., or blank for final -->
diff --git a/tck-dist/pom.xml b/tck-dist/pom.xml
index 1f9278dd..64a04f08 100644
--- a/tck-dist/pom.xml
+++ b/tck-dist/pom.xml
@@ -48,7 +48,7 @@
 
         <maven.site.skip>true</maven.site.skip>
         <asciidoctor-maven.version>3.0.0</asciidoctor-maven.version>
-        <asciidoctorj-pdf.version>2.3.17</asciidoctorj-pdf.version>
+        <asciidoctorj-pdf.version>2.3.18</asciidoctorj-pdf.version>
         <maven-assembly-plugin.version>3.7.1</maven-assembly-plugin.version>
     </properties>