diff --git a/pom.xml b/pom.xml
index 08bdcae..bdd71f1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
     <!-- Plugin versions -->
     <asciidoctor-maven-plugin.version>2.0.0-RC.1</asciidoctor-maven-plugin.version>
     <asciidoctorj.version>2.0.0</asciidoctorj.version>
-    <asciidoctorj-diagram.version>1.5.16</asciidoctorj-diagram.version>
+    <asciidoctorj-diagram.version>2.1.2</asciidoctorj-diagram.version>
     <asciidoctorj-pdf.version>1.5.0-alpha.17</asciidoctorj-pdf.version>
     <revealjs.version>3.8.0</revealjs.version>
     <asciidoctor-revealjs.version>2.0.0</asciidoctor-revealjs.version>