diff --git a/ethereum/source/java-demo/pom.xml b/ethereum/source/java-demo/pom.xml
index 3102a77..1a955c6 100644
--- a/ethereum/source/java-demo/pom.xml
+++ b/ethereum/source/java-demo/pom.xml
@@ -115,7 +115,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.5.5</version>
+            <version>4.5.13</version>
         </dependency>
 
         <dependency>