diff --git a/build.gradle b/build.gradle
index 6e63030c..5bed704f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -56,7 +56,7 @@ dependencies {
 
     testImplementation 'org.testng:testng:7.11.0'
     testImplementation 'org.pitest:pitest-testng-plugin:1.0.0'
-    testImplementation 'nl.jqno.equalsverifier:equalsverifier:3.19.4'
+    testImplementation 'nl.jqno.equalsverifier:equalsverifier:4.0'
 }
 
 def firstInstance = project.hasProperty('thread0')