diff --git a/build.gradle b/build.gradle
index 7a8b1ed503f435d868c2094c83611c83a2fd6977..a30218feceaf1abca8782ce1b3296e4d29ce47d3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -43,7 +43,7 @@ ext {
 	reactorVersion       = "Californium-BUILD-SNAPSHOT"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
-	rxjava2Version       = "2.1.16"
+	rxjava2Version       = "2.1.17"
 	slf4jVersion         = "1.7.25"	  // spring-jcl + consistent 3rd party deps
 	tiles3Version        = "3.0.8"
 	tomcatVersion        = "9.0.10"