diff --git a/codes/javatool/javatool-monitor/javatool-zipkin-spring/pom.xml b/codes/javatool/javatool-monitor/javatool-zipkin-spring/pom.xml
index 8ada12b7..fb67dff1 100644
--- a/codes/javatool/javatool-monitor/javatool-zipkin-spring/pom.xml
+++ b/codes/javatool/javatool-monitor/javatool-zipkin-spring/pom.xml
@@ -51,7 +51,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.5.11</version>
+            <version>4.5.13</version>
         </dependency>
 
         <!-- Adds the MVC class and method names to server spans -->