diff --git a/build.gradle b/build.gradle
index 611e0a69..24b7f855 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,9 +23,9 @@ buildscript {
 		maven { url 'https://repo.springsource.org/plugins-snapshot' }
 	}
 	dependencies {
-		classpath('io.spring.gradle:propdeps-plugin:0.0.8')
-		classpath('org.asciidoctor:asciidoctor-gradle-plugin:1.5.6')
-		classpath 'org.asciidoctor:asciidoctorj-pdf:1.5.0-alpha.16'
+		classpath("io.spring.gradle:propdeps-plugin:0.0.8")
+		classpath('org.asciidoctor:asciidoctor-gradle-plugin:1.6.1')
+		classpath 'org.asciidoctor:asciidoctorj-pdf:1.5.3'
 		classpath("org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion")
 	}
 }