diff --git a/build.gradle.kts b/build.gradle.kts
index 4a2e158..4a2d40f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -15,7 +15,7 @@ repositories {
 dependencies {
   compileOnly("net.jcip:jcip-annotations:1.0")
 
-  testImplementation("nl.jqno.equalsverifier:equalsverifier:3.19.4")
+  testImplementation("nl.jqno.equalsverifier:equalsverifier:4.2.3")
 
   testImplementation("org.junit.jupiter:junit-jupiter-api:5.11.4")
   testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.11.4")