diff --git a/chapter-09/zuulsvr/pom.xml b/chapter-09/zuulsvr/pom.xml
index 60ebc41..b763fa1 100644
--- a/chapter-09/zuulsvr/pom.xml
+++ b/chapter-09/zuulsvr/pom.xml
@@ -58,7 +58,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.5.2</version>
+            <version>4.5.13</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.cloud</groupId>