diff --git a/build/optaplanner-build-parent/pom.xml b/build/optaplanner-build-parent/pom.xml
index f3a55868ad..6ce0e06209 100644
--- a/build/optaplanner-build-parent/pom.xml
+++ b/build/optaplanner-build-parent/pom.xml
@@ -438,7 +438,7 @@
               <!-- Required to generate the PDF file -->
               <groupId>org.asciidoctor</groupId>
               <artifactId>asciidoctorj-pdf</artifactId>
-              <version>2.3.7</version>
+              <version>2.3.18</version>
             </dependency>
           </dependencies>
         </plugin>