diff --git a/build.gradle b/build.gradle
index 104fbdfac..5a9c1e3ed 100644
--- a/build.gradle
+++ b/build.gradle
@@ -138,7 +138,7 @@ repositories {
 }
 
 ext {
-  log4JVersion = "2.20.0"
+  log4JVersion = "2.21.0"
 }
 
 ext['snakeyaml.version'] = '2.0'