diff --git a/postpone/pom.xml b/postpone/pom.xml
index 6d6d732..c65f654 100644
--- a/postpone/pom.xml
+++ b/postpone/pom.xml
@@ -51,7 +51,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.13.3</version>
+            <version>2.17.0</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
         <dependency>