diff --git a/spring-integration-kotlin-dsl/build.gradle b/spring-integration-kotlin-dsl/build.gradle
index 09aebb3..0902aa4 100644
--- a/spring-integration-kotlin-dsl/build.gradle
+++ b/spring-integration-kotlin-dsl/build.gradle
@@ -3,10 +3,10 @@ plugins {
     id 'eclipse'
     id 'idea'
     id 'jacoco'
-    id 'org.sonarqube' version '2.7.1'
+    id 'org.sonarqube' version '2.8'
     id 'io.spring.dependency-management' version '1.0.8.RELEASE'
     id 'org.jetbrains.kotlin.jvm' version "$kotlinVersion"
-    id "org.jetbrains.kotlin.plugin.spring" version "$kotlinVersion"
+    id 'org.jetbrains.kotlin.plugin.spring' version "$kotlinVersion"
     id 'org.jetbrains.dokka' version '0.9.18'
 }
 
@@ -30,8 +30,8 @@ ext {
     jacksonVersion = '2.10.0'
     junitVersion = '5.5.2'
     log4jVersion = '2.12.1'
-    reactorVersion = 'Dysprosium-RELEASE'
-    springIntegrationVersion = '5.2.1.BUILD-SNAPSHOT'
+    reactorVersion = 'Dysprosium-RC1'
+    springIntegrationVersion = '5.2.1.RELEASE'
 
     idPrefix = 'kotlin-dsl'
 
@@ -127,7 +127,7 @@ task api(type: org.jetbrains.dokka.gradle.DokkaTask) {
         url = new URL("https://docs.spring.io/spring-integration/docs/$springIntegrationVersion/api/")
     }
     externalDocumentationLink {
-        url = new URL("https://docs.spring.io/spring-framework/docs/current/javadoc-api/")
+        url = new URL('https://docs.spring.io/spring-framework/docs/current/javadoc-api/')
     }
     externalDocumentationLink {
         url = new URL('https://projectreactor.io/docs/core/release/api/')
diff --git a/spring-integration-kotlin-dsl/gradle/wrapper/gradle-wrapper.properties b/spring-integration-kotlin-dsl/gradle/wrapper/gradle-wrapper.properties
index 7c4388a..5028f28 100644
--- a/spring-integration-kotlin-dsl/gradle/wrapper/gradle-wrapper.properties
+++ b/spring-integration-kotlin-dsl/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists