diff --git a/build.gradle b/build.gradle
index 80f5e382ca..11c03e81d6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -54,7 +54,7 @@ configure(allprojects) { project ->
 	ext.log4jVersion         = "2.9.1"
 	ext.nettyVersion         = "4.1.17.Final"
 	ext.reactorVersion       = "Bismuth-SR4"
-	ext.rxjavaVersion        = "1.3.3"
+	ext.rxjavaVersion        = "1.3.4"
 	ext.rxjavaAdapterVersion = "1.2.1"
 	ext.rxjava2Version       = "2.1.6"
 	ext.slf4jVersion         = "1.7.25"