diff --git a/Plan/build.gradle b/Plan/build.gradle
index 1f2aca3c9..14540013a 100644
--- a/Plan/build.gradle
+++ b/Plan/build.gradle
@@ -74,7 +74,7 @@ subprojects {
     ext.h2Version = "1.4.199"
     ext.mysqlVersion = "8.0.17"
     ext.hikariVersion = "3.3.1"
-    ext.slf4jVersion = "1.7.27"
+    ext.slf4jVersion = "1.7.28"
     ext.geoIpVersion = "2.12.0"
     ext.guavaVersion = "28.0-jre"
     ext.bstatsVersion = "1.4"