diff --git a/plain-servlet/pom.xml b/plain-servlet/pom.xml
index 107affb..254bd70 100644
--- a/plain-servlet/pom.xml
+++ b/plain-servlet/pom.xml
@@ -320,7 +320,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.3.6</version>
+            <version>4.5.13</version>
             <scope>test</scope>
         </dependency>