diff --git a/1_security/2_praxis/security-testing-demos/pom.xml b/1_security/2_praxis/security-testing-demos/pom.xml
index af2eb13..5825435 100644
--- a/1_security/2_praxis/security-testing-demos/pom.xml
+++ b/1_security/2_praxis/security-testing-demos/pom.xml
@@ -76,7 +76,7 @@
         <dependency>
             <groupId>org.apache.poi</groupId>
             <artifactId>poi-ooxml</artifactId>
-            <version>5.3.0</version>
+            <version>5.4.0</version>
         </dependency>
 
         <dependency>