diff --git a/spec/pom.xml b/spec/pom.xml
index c1d69c70f..890ce122f 100644
--- a/spec/pom.xml
+++ b/spec/pom.xml
@@ -21,7 +21,7 @@
 <artifactId>spec</artifactId>
 
 <properties>
-    <asciidoctor-maven.version>2.2.2</asciidoctor-maven.version>
+    <asciidoctor-maven.version>2.2.4</asciidoctor-maven.version>
     <asciidoctorj-pdf.version>2.3.7</asciidoctorj-pdf.version>
     <maven.build.timestamp.format>MMMM dd, yyyy</maven.build.timestamp.format>
     <revisiondate>${maven.build.timestamp}</revisiondate>