diff --git a/build.gradle b/build.gradle
index 56c6ba1f32..d57c2dc8e8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,7 @@ buildscript {
 		maven { url "https://repo.spring.io/plugins-release" }
 	}
 	dependencies {
-		classpath("io.spring.gradle:propdeps-plugin:0.0.8")
+		classpath("io.spring.gradle:propdeps-plugin:0.0.9.RELEASE")
 		classpath("io.spring.gradle:docbook-reference-plugin:0.3.1")
 		classpath("org.asciidoctor:asciidoctorj-pdf:1.5.0-alpha.16")
 		classpath("org.asciidoctor:asciidoctorj-epub3:1.5.0-alpha.7")
@@ -13,7 +13,7 @@ buildscript {
 // 3rd party plugin repositories can be configured in settings.gradle
 plugins {
 	id "com.gradle.build-scan" version "1.8"
-	id "io.spring.dependency-management" version "1.0.3.RELEASE" apply false
+	id "io.spring.dependency-management" version "1.0.7.RELEASE" apply false
 	id "org.jetbrains.kotlin.jvm" version "1.2.71" apply false
 	id "org.jetbrains.dokka" version "0.9.17"
 	id "org.asciidoctor.convert" version "1.5.6"
@@ -41,13 +41,13 @@ ext {
 	groovyVersion        = "2.4.16"
 	hsqldbVersion        = "2.4.1"
 	jackson2Version      = "2.9.8"
-	jettyVersion         = "9.4.17.v20190418"
+	jettyVersion         = "9.4.18.v20190429"
 	junitJupiterVersion  = "5.0.3"
 	junitPlatformVersion = "1.0.3"
 	junitVintageVersion  = "4.12.3"
 	kotlinVersion        = "1.2.71"
 	log4jVersion         = "2.11.2"
-	nettyVersion         = "4.1.35.Final"
+	nettyVersion         = "4.1.36.Final"
 	reactorVersion       = "Bismuth-SR17"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"