diff --git a/asciidoc-maven-site-example/pom.xml b/asciidoc-maven-site-example/pom.xml
index ce87301c..2342997f 100644
--- a/asciidoc-maven-site-example/pom.xml
+++ b/asciidoc-maven-site-example/pom.xml
@@ -13,7 +13,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
     </properties>
diff --git a/asciidoc-multiple-inputs-example/pom.xml b/asciidoc-multiple-inputs-example/pom.xml
index 51b0e3cd..e19151af 100644
--- a/asciidoc-multiple-inputs-example/pom.xml
+++ b/asciidoc-multiple-inputs-example/pom.xml
@@ -12,7 +12,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.pdf.version>2.3.10</asciidoctorj.pdf.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
diff --git a/asciidoc-to-html-example/pom.xml b/asciidoc-to-html-example/pom.xml
index d7049551..582deb60 100644
--- a/asciidoc-to-html-example/pom.xml
+++ b/asciidoc-to-html-example/pom.xml
@@ -12,7 +12,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
     </properties>
diff --git a/asciidoc-to-html-multipage-example/pom.xml b/asciidoc-to-html-multipage-example/pom.xml
index 77b1076a..815a4e4b 100644
--- a/asciidoc-to-html-multipage-example/pom.xml
+++ b/asciidoc-to-html-multipage-example/pom.xml
@@ -14,7 +14,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <asciidoctor-multipage.version>0.0.16</asciidoctor-multipage.version>
         <jruby.version>9.4.5.0</jruby.version>
diff --git a/asciidoc-to-revealjs-example/pom.xml b/asciidoc-to-revealjs-example/pom.xml
index 9c2a5a2a..10c28feb 100644
--- a/asciidoc-to-revealjs-example/pom.xml
+++ b/asciidoc-to-revealjs-example/pom.xml
@@ -13,7 +13,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
         <revealjs.version>3.9.2</revealjs.version>
diff --git a/asciidoctor-diagram-example/pom.xml b/asciidoctor-diagram-example/pom.xml
index 176f609e..e4cd6db4 100644
--- a/asciidoctor-diagram-example/pom.xml
+++ b/asciidoctor-diagram-example/pom.xml
@@ -10,7 +10,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <asciidoctorj.diagram.version>2.2.17</asciidoctorj.diagram.version>
         <jruby.version>9.4.5.0</jruby.version>
diff --git a/asciidoctor-epub-example/pom.xml b/asciidoctor-epub-example/pom.xml
index fb902e64..b0957212 100644
--- a/asciidoctor-epub-example/pom.xml
+++ b/asciidoctor-epub-example/pom.xml
@@ -14,7 +14,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.epub.version>2.0.1</asciidoctorj.epub.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <!-- for a correct kf8 generation, you'll need at least jRuby >= 9.1.8.0 -->
diff --git a/asciidoctor-pdf-cjk-example/pom.xml b/asciidoctor-pdf-cjk-example/pom.xml
index 4ecd2791..232baaca 100644
--- a/asciidoctor-pdf-cjk-example/pom.xml
+++ b/asciidoctor-pdf-cjk-example/pom.xml
@@ -15,7 +15,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <asciidoctorj.pdf.version>2.3.10</asciidoctorj.pdf.version>
         <jruby.version>9.4.5.0</jruby.version>
diff --git a/asciidoctor-pdf-example/pom.xml b/asciidoctor-pdf-example/pom.xml
index e0dbd826..feb20c7a 100644
--- a/asciidoctor-pdf-example/pom.xml
+++ b/asciidoctor-pdf-example/pom.xml
@@ -12,7 +12,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.pdf.version>2.3.10</asciidoctorj.pdf.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
diff --git a/asciidoctor-pdf-with-theme-example/pom.xml b/asciidoctor-pdf-with-theme-example/pom.xml
index 53a72155..21edcbff 100644
--- a/asciidoctor-pdf-with-theme-example/pom.xml
+++ b/asciidoctor-pdf-with-theme-example/pom.xml
@@ -12,7 +12,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.pdf.version>2.3.10</asciidoctorj.pdf.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
diff --git a/docbook-pipeline-docbkx-example/pom.xml b/docbook-pipeline-docbkx-example/pom.xml
index 64134645..c76cb463 100644
--- a/docbook-pipeline-docbkx-example/pom.xml
+++ b/docbook-pipeline-docbkx-example/pom.xml
@@ -12,7 +12,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
     </properties>
diff --git a/java-extension-example/asciidoctor-with-extension-example/pom.xml b/java-extension-example/asciidoctor-with-extension-example/pom.xml
index 5727b286..127690bc 100644
--- a/java-extension-example/asciidoctor-with-extension-example/pom.xml
+++ b/java-extension-example/asciidoctor-with-extension-example/pom.xml
@@ -10,7 +10,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <asciidoctor.maven.plugin.version>2.2.5</asciidoctor.maven.plugin.version>
+        <asciidoctor.maven.plugin.version>2.2.6</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>2.5.11</asciidoctorj.version>
         <jruby.version>9.4.5.0</jruby.version>
     </properties>