diff --git a/04_springboot_thymeleaf/pom.xml b/04_springboot_thymeleaf/pom.xml
index 62abb76..6315c2a 100644
--- a/04_springboot_thymeleaf/pom.xml
+++ b/04_springboot_thymeleaf/pom.xml
@@ -78,7 +78,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.2.5</version>
+            <version>4.3.6</version>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>