diff --git a/pom.xml b/pom.xml
index 19168cf..21c0559 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,7 +50,7 @@
     <slf4j.version>1.7.21</slf4j.version>
 
     <!-- For testing only. -->
-    <log4j.version>2.16.0</log4j.version>
+    <log4j.version>2.17.0</log4j.version>
     <hamcrest.optional>1.0</hamcrest.optional>
   </properties>