diff --git a/samplecode/mio/client-java/pom.xml b/samplecode/mio/client-java/pom.xml
index 843515f..2f38126 100644
--- a/samplecode/mio/client-java/pom.xml
+++ b/samplecode/mio/client-java/pom.xml
@@ -67,7 +67,7 @@
 		<dependency>
 			<groupId>org.apache.httpcomponents</groupId>
 			<artifactId>httpclient</artifactId>
-			<version>4.4</version>
+			<version>4.5.13</version>
 		</dependency>
 	</dependencies>