diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 2f0f6e613f..3343482ced 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -17,7 +17,7 @@ org-opensaml5 = "5.1.2"
 org-springframework = "6.2.13"
 
 [libraries]
-ch-qos-logback-logback-classic = "ch.qos.logback:logback-classic:1.5.20"
+ch-qos-logback-logback-classic = "ch.qos.logback:logback-classic:1.5.21"
 com-fasterxml-jackson-jackson-bom = "com.fasterxml.jackson:jackson-bom:2.18.5"
 com-google-inject-guice = "com.google.inject:guice:3.0"
 com-netflix-nebula-nebula-project-plugin = "com.netflix.nebula:nebula-project-plugin:8.2.0"