diff --git a/build.gradle b/build.gradle
index a51fc15..9e967cf 100644
--- a/build.gradle
+++ b/build.gradle
@@ -25,7 +25,7 @@ repositories {
 
 dependencies {
     testCompile 'junit:junit:4.13'
-    testCompile 'org.assertj:assertj-core:3.14.0'
+    testCompile 'org.assertj:assertj-core:3.20.2'
     testCompile 'eu.codearte.catch-exception:catch-exception:2.0'
     testCompile 'org.mockito:mockito-core:3.2.4'
     testCompile 'nl.jqno.equalsverifier:equalsverifier:3.1.11'