diff --git a/pom.xml b/pom.xml
index 5e1a028..21ce035 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,7 +48,7 @@
         <java.version>1.8</java.version>
         <encoding>utf-8</encoding>
 
-        <asciidoctor.pdf.version>1.6.0</asciidoctor.pdf.version>
+        <asciidoctor.pdf.version>2.3.0</asciidoctor.pdf.version>
         <asciidoctorj.version>1.5.6</asciidoctorj.version>
         <celesta.version>7.4.15</celesta.version>