diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 77539c81..147f5f59 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -18,7 +18,7 @@ checker = { module = "org.checkerframework:checker", version.ref = "checker" }
 checkerq = { module = "org.checkerframework:checker-qual", version.ref = "checker" }
 
 slf4j = "org.slf4j:slf4j-api:2.0.17"
-logback = "ch.qos.logback:logback-classic:1.5.20"
+logback = "ch.qos.logback:logback-classic:1.5.21"
 
 jackson-bom = "com.fasterxml.jackson:jackson-bom:2.20.1"
 jackson-databind = { module = "com.fasterxml.jackson.core:jackson-databind" }