diff --git a/gradle/dependency-management.gradle b/gradle/dependency-management.gradle
index a38fe5a670..8637b90a95 100644
--- a/gradle/dependency-management.gradle
+++ b/gradle/dependency-management.gradle
@@ -1,5 +1,5 @@
 if (!project.hasProperty('reactorVersion')) {
-	ext.reactorVersion = 'Californium-SR20'
+	ext.reactorVersion = 'Californium-SR21'
 }
 
 if (!project.hasProperty('springVersion')) {