diff --git a/zetark-oauth2-client/pom.xml b/zetark-oauth2-client/pom.xml
index bfd5e5d..4d93f4a 100644
--- a/zetark-oauth2-client/pom.xml
+++ b/zetark-oauth2-client/pom.xml
@@ -36,7 +36,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.4.1</version>
+            <version>4.5.13</version>
         </dependency>
 
         <dependency>