diff --git a/docs/build.gradle b/docs/build.gradle
index c23de683..b3e58bb8 100644
--- a/docs/build.gradle
+++ b/docs/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-	id 'org.asciidoctor.convert' version '1.5.3'
+	id 'org.asciidoctor.convert' version '1.5.6'
 }
 
 repositories {
@@ -28,4 +28,4 @@ asciidoctor {
 	attributes	'revnumber': project.version,
 				'branch-or-tag': project.version.endsWith('SNAPSHOT') ? 'master': "v${project.version}"
 	inputs.files(sourceSets.test.java)
-}
\ No newline at end of file
+}
diff --git a/docs/src/docs/asciidoc/getting-started.adoc b/docs/src/docs/asciidoc/getting-started.adoc
index d66187d4..3d8dc215 100644
--- a/docs/src/docs/asciidoc/getting-started.adoc
+++ b/docs/src/docs/asciidoc/getting-started.adoc
@@ -154,7 +154,7 @@ the configuration are described below.
 .Gradle
 ----
 	plugins { <1>
-		id "org.asciidoctor.convert" version "1.5.3"
+		id "org.asciidoctor.convert" version "1.5.6"
 	}
 
 	dependencies {
diff --git a/samples/junit5/build.gradle b/samples/junit5/build.gradle
index 3322b651..5a1b870e 100644
--- a/samples/junit5/build.gradle
+++ b/samples/junit5/build.gradle
@@ -9,7 +9,7 @@ buildscript {
 }
 
 plugins {
-	id "org.asciidoctor.convert" version "1.5.3"
+	id "org.asciidoctor.convert" version "1.5.6"
 }
 
 apply plugin: 'java'
diff --git a/samples/rest-assured/build.gradle b/samples/rest-assured/build.gradle
index f7934baa..3a5e3a92 100644
--- a/samples/rest-assured/build.gradle
+++ b/samples/rest-assured/build.gradle
@@ -8,7 +8,7 @@ buildscript {
 }
 
 plugins {
-	id "org.asciidoctor.convert" version "1.5.3"
+	id "org.asciidoctor.convert" version "1.5.6"
 }
 
 apply plugin: 'java'
diff --git a/samples/rest-notes-grails/build.gradle b/samples/rest-notes-grails/build.gradle
index 7cec2036..cdacc5f8 100644
--- a/samples/rest-notes-grails/build.gradle
+++ b/samples/rest-notes-grails/build.gradle
@@ -9,7 +9,7 @@ buildscript {
 }
 
 plugins {
-	id 'org.asciidoctor.convert' version '1.5.3'
+	id 'org.asciidoctor.convert' version '1.5.6'
 }
 
 version "0.1"
diff --git a/samples/rest-notes-spring-hateoas/build.gradle b/samples/rest-notes-spring-hateoas/build.gradle
index 5a4f206a..ae7aaee8 100644
--- a/samples/rest-notes-spring-hateoas/build.gradle
+++ b/samples/rest-notes-spring-hateoas/build.gradle
@@ -8,7 +8,7 @@ buildscript {
 }
 
 plugins {
-	id "org.asciidoctor.convert" version "1.5.3"
+	id "org.asciidoctor.convert" version "1.5.6"
 }
 
 apply plugin: 'java'
diff --git a/samples/testng/build.gradle b/samples/testng/build.gradle
index 7b654c5f..c7d70ed1 100644
--- a/samples/testng/build.gradle
+++ b/samples/testng/build.gradle
@@ -8,7 +8,7 @@ buildscript {
 }
 
 plugins {
-	id "org.asciidoctor.convert" version "1.5.3"
+	id "org.asciidoctor.convert" version "1.5.6"
 }
 
 apply plugin: 'java'
diff --git a/samples/web-test-client/build.gradle b/samples/web-test-client/build.gradle
index 96aba787..e6d90f12 100644
--- a/samples/web-test-client/build.gradle
+++ b/samples/web-test-client/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-	id "org.asciidoctor.convert" version "1.5.3"
+	id "org.asciidoctor.convert" version "1.5.6"
 }
 
 apply plugin: 'java'