diff --git a/build.gradle.kts b/build.gradle.kts
index 3173c17..f081997 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -38,7 +38,7 @@ dependencies {
   implementation("org.apache.groovy:groovy-json:${groovyVersion}")
 
   implementation("org.slf4j:slf4j-api:2.0.17")
-  testRuntimeOnly("ch.qos.logback:logback-classic:1.3.14")
+  testRuntimeOnly("ch.qos.logback:logback-classic:1.5.20")
 
   testImplementation("org.spockframework:spock-core:2.3-groovy-4.0")
   testImplementation("cglib:cglib-nodep:3.3.0")