diff --git a/spring-web-reactive/build.gradle b/spring-web-reactive/build.gradle
index 427767e6ca..8078bbf5c2 100644
--- a/spring-web-reactive/build.gradle
+++ b/spring-web-reactive/build.gradle
@@ -30,7 +30,7 @@ ext {
 	springVersion = '4.2.3.RELEASE'
 	reactorVersion = '2.5.0.BUILD-SNAPSHOT'
 	reactorNettyVersion = '2.5.0.BUILD-SNAPSHOT'
-	tomcatVersion = '8.0.28'
+	tomcatVersion = '8.0.33'
 	jettyVersion = '9.3.5.v20151012'
 	nettyVersion = '4.1.0.CR3'
 
@@ -96,7 +96,7 @@ dependencies {
 
 	optional "org.springframework:spring-context-support:${springVersion}" // for FreeMarker
 	optional 'io.reactivex:rxjava:1.1.0'
-	optional "io.reactivex:rxnetty-http:0.5.0-SNAPSHOT"
+	optional "io.reactivex:rxnetty-http:0.5.2-SNAPSHOT"
 	optional "com.fasterxml.jackson.core:jackson-databind:2.6.2"
 	optional "io.projectreactor:reactor-netty:${reactorNettyVersion}"
 	optional "org.apache.tomcat:tomcat-util:${tomcatVersion}"
diff --git a/spring-web-reactive/src/main/java/org/springframework/http/client/reactive/RxNettyClientHttpResponse.java b/spring-web-reactive/src/main/java/org/springframework/http/client/reactive/RxNettyClientHttpResponse.java
index 5edd02ef9e..9077bdc0f5 100644
--- a/spring-web-reactive/src/main/java/org/springframework/http/client/reactive/RxNettyClientHttpResponse.java
+++ b/spring-web-reactive/src/main/java/org/springframework/http/client/reactive/RxNettyClientHttpResponse.java
@@ -56,7 +56,7 @@ public class RxNettyClientHttpResponse implements ClientHttpResponse {
 		this.allocator = allocator;
 		this.response = response;
 		this.headers = new HttpHeaders();
-		this.response.headerIterator().forEachRemaining(e -> this.headers.set(e.getKey(), e.getValue()));
+		this.response.headerIterator().forEachRemaining(e -> this.headers.set(e.getKey().toString(), e.getValue().toString()));
 		this.cookies = initCookies(response);
 	}