diff --git a/build.gradle b/build.gradle
index 38899ab..119bea7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -46,7 +46,7 @@ configure(allprojects) {
 		springBootVersion = project.findProperty("springBootVersion") ?: "2.1.1.RELEASE"
 		springVersion = project.findProperty("springVersion") ?: "5.1.3.RELEASE"
 		reactorVersion = project.findProperty("reactorVersion") ?: "Californium-SR3"
-		openServiceBrokerVersion = "3.0.0.M3"
+		openServiceBrokerVersion = "3.0.0.M4"
 		springCredhubVersion = "2.0.0.BUILD-SNAPSHOT"
 		cfJavaClientVersion = "3.15.0.RELEASE"
 		mockitoVersion = "2.23.4"