diff --git a/build.gradle b/build.gradle
index aa82c8f35d..10717c0496 100644
--- a/build.gradle
+++ b/build.gradle
@@ -38,7 +38,7 @@ ext {
 	kotlinVersion        = "1.2.71"
 	log4jVersion         = "2.11.1"
 	nettyVersion         = "4.1.30.Final"
-	reactorVersion       = "Californium-BUILD-SNAPSHOT"
+	reactorVersion       = "Californium-SR1"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
 	rxjava2Version       = "2.2.2"