diff --git a/spec/pom.xml b/spec/pom.xml
index c329204c..ac5b7d63 100644
--- a/spec/pom.xml
+++ b/spec/pom.xml
@@ -24,7 +24,7 @@
 
 	<properties>
 		<asciidoctor-maven.version>3.0.0</asciidoctor-maven.version>
-		<asciidoctorj.version>2.5.11</asciidoctorj.version>
+		<asciidoctorj.version>2.5.13</asciidoctorj.version>
 		<asciidoctorj-pdf.version>2.3.14</asciidoctorj-pdf.version>
 		<!-- asl2 for non-final releases, or final for EFSL -->
 		<license-file>asl2</license-file>