diff --git a/build.gradle b/build.gradle
index bfb3e4d163..b8927df1c4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -56,7 +56,7 @@ configure(allprojects) { project ->
 	ext.reactorVersion       = "Californium-BUILD-SNAPSHOT"
 	ext.rxjavaVersion        = "1.3.8"
 	ext.rxjavaAdapterVersion = "1.2.1"
-	ext.rxjava2Version       = "2.1.12"
+	ext.rxjava2Version       = "2.1.13"
 	ext.slf4jVersion         = "1.7.25"	 // spring-jcl + consistent 3rd party deps
 	ext.tiles3Version        = "3.0.8"
 	ext.tomcatVersion        = "9.0.7"