diff --git a/06.1-complete-interface-demo/pom.xml b/06.1-complete-interface-demo/pom.xml
index 3a358ad..2ed6d11 100644
--- a/06.1-complete-interface-demo/pom.xml
+++ b/06.1-complete-interface-demo/pom.xml
@@ -21,7 +21,7 @@
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.12</version>
+			<version>4.13.1</version>
 		</dependency>
 		<dependency>
 			<groupId>ch.qos.logback</groupId>