diff --git a/quarkus-workshop-super-heroes/docs/pom.xml b/quarkus-workshop-super-heroes/docs/pom.xml
index 3cf068a22..2fd3af292 100644
--- a/quarkus-workshop-super-heroes/docs/pom.xml
+++ b/quarkus-workshop-super-heroes/docs/pom.xml
@@ -35,7 +35,7 @@ The default build will take around 50m.
         <version.asciidoctor.maven.plugin>2.2.4</version.asciidoctor.maven.plugin>
         <version.jruby>9.4.5.0</version.jruby>
         <version.asciidoctorj>2.5.10</version.asciidoctorj>
-        <version.asciidoctorj.pdf>2.3.9</version.asciidoctorj.pdf>
+        <version.asciidoctorj.pdf>2.3.18</version.asciidoctorj.pdf>
         <version.asciidoctorj.diagram>2.2.13</version.asciidoctorj.diagram>
         <!-- If building docs locally and urls matter, set environment variables for these values -->
         <github.raw>https://raw.githubusercontent.com/${env.GITHUB_REPOSITORY}/${env.GITHUB_REF}/quarkus-workshop-super-heroes</github.raw>