diff --git a/examples/kafka-cluster/build.gradle b/examples/kafka-cluster/build.gradle
index db07c6859f3..1946d3b74b1 100644
--- a/examples/kafka-cluster/build.gradle
+++ b/examples/kafka-cluster/build.gradle
@@ -11,7 +11,7 @@ dependencies {
     testAnnotationProcessor "org.projectlombok:lombok:1.18.10"
     testCompile 'org.testcontainers:kafka'
     testCompile 'org.apache.kafka:kafka-clients:2.3.1'
-    testCompile 'org.assertj:assertj-core:3.14.0'
+    testCompile 'org.assertj:assertj-core:3.21.0'
     testCompile 'com.google.guava:guava:23.0'
     testCompile 'org.slf4j:slf4j-simple:1.7.30'
 }