diff --git a/pom.xml b/pom.xml
index da07491..be1f3a0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,7 +44,7 @@
         <maven-compiler-plugin.version>3.12.1</maven-compiler-plugin.version>
 
         <!-- Spec document -->
-        <asciidoctor-maven.version>2.2.5</asciidoctor-maven.version>
+        <asciidoctor-maven.version>2.2.6</asciidoctor-maven.version>
         <asciidoctorj-pdf.version>2.3.12</asciidoctorj-pdf.version>
         <maven.build.timestamp.format>MMMM dd, yyyy</maven.build.timestamp.format>
         <revisiondate>${maven.build.timestamp}</revisiondate>