diff --git a/ch9/ctscans/calculate-basis-vectors/pom.xml b/ch9/ctscans/calculate-basis-vectors/pom.xml
index 05b47da..5485eec 100644
--- a/ch9/ctscans/calculate-basis-vectors/pom.xml
+++ b/ch9/ctscans/calculate-basis-vectors/pom.xml
@@ -33,7 +33,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.4</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>