diff --git a/code/demo/pom.xml b/code/demo/pom.xml
index 31eb9b4..afd3a77 100644
--- a/code/demo/pom.xml
+++ b/code/demo/pom.xml
@@ -29,7 +29,7 @@
     <dependency>
       <groupId>org.scala-lang</groupId>
       <artifactId>scala-library</artifactId>
-      <version>2.13.0</version>
+      <version>2.13.9</version>
     </dependency>
   </dependencies>