diff --git a/pom.xml b/pom.xml
index 7e0dc99306..94d240be15 100644
--- a/pom.xml
+++ b/pom.xml
@@ -88,7 +88,7 @@
     <asciidoctor.maven.plugin.version>2.2.4</asciidoctor.maven.plugin.version>
     <asciidoctorj.version>2.5.10</asciidoctorj.version>
     <asciidoctorj.pdf.version>2.3.7</asciidoctorj.pdf.version>
-    <asciidoctorj.diagram.version>2.2.8</asciidoctorj.diagram.version>
+    <asciidoctorj.diagram.version>2.2.9</asciidoctorj.diagram.version>
     <buildnumber.plugin.version>1.4</buildnumber.plugin.version>
     <jmh.version>1.36</jmh.version>
     <spotless.version>2.37.0</spotless.version>