diff --git a/pom.xml b/pom.xml
index ccf9418..b77bb7b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6641,7 +6641,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.5.5</version>
+            <version>4.5.13</version>
         </dependency>
         <dependency>
             <groupId>net.fortuna.ical4j</groupId>