diff --git a/sky-ladder-basic/pom.xml b/sky-ladder-basic/pom.xml
index 04cad25..93c0a1c 100644
--- a/sky-ladder-basic/pom.xml
+++ b/sky-ladder-basic/pom.xml
@@ -30,7 +30,7 @@
         <dependency>
             <groupId>org.apache.pdfbox</groupId>
             <artifactId>pdfbox</artifactId>
-            <version>2.0.21</version>
+            <version>2.0.24</version>
         </dependency>
 
         <!-- https://mvnrepository.com/artifact/org.dom4j/dom4j -->