diff --git a/client/spec/pom.xml b/client/spec/pom.xml
index d263dc5..4ec2ed4 100644
--- a/client/spec/pom.xml
+++ b/client/spec/pom.xml
@@ -62,7 +62,7 @@
                     <dependency>
                         <groupId>org.asciidoctor</groupId>
                         <artifactId>asciidoctorj-diagram</artifactId>
-                        <version>2.2.14</version>
+                        <version>2.3.1</version>
                     </dependency>
                 </dependencies>
                 <configuration>