diff --git a/build.gradle b/build.gradle
index 2119ea7eaa..36d8907584 100644
--- a/build.gradle
+++ b/build.gradle
@@ -28,7 +28,7 @@ configure(allprojects) { project ->
 	dependencyManagement {
 		imports {
 			mavenBom "com.fasterxml.jackson:jackson-bom:2.12.7"
-			mavenBom "io.netty:netty-bom:4.1.93.Final"
+			mavenBom "io.netty:netty-bom:4.1.94.Final"
 			mavenBom "io.projectreactor:reactor-bom:2020.0.33"
 			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR13"
 			mavenBom "io.rsocket:rsocket-bom:1.1.3"
@@ -128,18 +128,18 @@ configure(allprojects) { project ->
 			dependency "org.webjars:webjars-locator-core:0.48"
 			dependency "org.webjars:underscorejs:1.8.3"
 
-			dependencySet(group: 'org.apache.tomcat', version: '9.0.75') {
+			dependencySet(group: 'org.apache.tomcat', version: '9.0.76') {
 				entry 'tomcat-util'
 				entry('tomcat-websocket') {
 					exclude group: "org.apache.tomcat", name: "tomcat-servlet-api"
 					exclude group: "org.apache.tomcat", name: "tomcat-websocket-api"
 				}
 			}
-			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.75') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.76') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
-			dependencySet(group: 'io.undertow', version: '2.2.24.Final') {
+			dependencySet(group: 'io.undertow', version: '2.2.25.Final') {
 				entry 'undertow-core'
 				entry('undertow-servlet') {
 					exclude group: "org.jboss.spec.javax.servlet", name: "jboss-servlet-api_4.0_spec"
@@ -340,7 +340,7 @@ configure([rootProject] + javaProjects) { project ->
 	}
 
 	checkstyle {
-		toolVersion = "10.9.3"
+		toolVersion = "10.12.1"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}