diff --git a/build.gradle b/build.gradle
index 9fb237e..941dcc5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -48,7 +48,7 @@ dependencies {
     testCompile 'org.junit.jupiter:junit-jupiter-api:5.4.2'
     testRuntime 'org.junit.jupiter:junit-jupiter-engine:5.4.2'
     testCompile "org.mockito:mockito-junit-jupiter:$mockitoVersion"
-    testCompile 'org.assertj:assertj-core:3.15.0'
+    testCompile 'org.assertj:assertj-core:3.20.1'
 }
 
 //Disable JavaDoc doclint on Java 8 - it fails on invalid JavaDoc elements in mockito-core jar