Update pom.xml (#4591)

pom.xml

@@ -189,7 +189,7 @@
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpclient</artifactId>
-                <version>4.5.1</version>
+                <version>4.5.13</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.zookeeper</groupId>