diff --git a/build.gradle b/build.gradle
index ab774843f2..96d9996449 100644
--- a/build.gradle
+++ b/build.gradle
@@ -45,14 +45,14 @@ configure(allprojects) { project ->
 	ext.freemarkerVersion    = "2.3.27-incubating"
 	ext.groovyVersion        = "2.4.13"
 	ext.hsqldbVersion        = "2.4.0"
-	ext.jackson2Version      = "2.9.2"
+	ext.jackson2Version      = "2.9.3"
 	ext.jettyVersion         = "9.4.8.v20171121"
 	ext.junitJupiterVersion  = "5.0.2"
 	ext.junitPlatformVersion = "1.0.2"
 	ext.junitVintageVersion  = "4.12.2"
 	ext.kotlinVersion        = "1.2.0"
 	ext.log4jVersion         = "2.10.0"
-	ext.nettyVersion         = "4.1.17.Final"
+	ext.nettyVersion         = "4.1.18.Final"
 	ext.reactorVersion       = "Bismuth-SR4"
 	ext.rxjavaVersion        = "1.3.4"
 	ext.rxjavaAdapterVersion = "1.2.1"
diff --git a/spring-web/spring-web.gradle b/spring-web/spring-web.gradle
index e326674438..a2921acbd6 100644
--- a/spring-web/spring-web.gradle
+++ b/spring-web/spring-web.gradle
@@ -73,7 +73,7 @@ dependencies {
 	}
 	testCompile("com.fasterxml.jackson.datatype:jackson-datatype-jdk8:${jackson2Version}")
 	testCompile("com.fasterxml.jackson.datatype:jackson-datatype-joda:${jackson2Version}")
-	testCompile("com.fasterxml.jackson.module:jackson-module-kotlin:${jackson2Version}")
+	testCompile("com.fasterxml.jackson.module:jackson-module-kotlin:2.9.2")  // no 2.9.3 yet
 	testCompile("org.apache.tomcat:tomcat-util:${tomcatVersion}")
 	testCompile("org.apache.tomcat.embed:tomcat-embed-core:${tomcatVersion}")
 	testCompile("org.eclipse.jetty:jetty-server:${jettyVersion}")