diff --git a/build.gradle b/build.gradle
index 9288ddd..bf8afac 100644
--- a/build.gradle
+++ b/build.gradle
@@ -45,7 +45,7 @@ dependencies {
 
     testCompile 'junit:junit:4.12'
     testCompile 'org.apache.commons:commons-lang3:3.4'
-    testCompile 'org.assertj:assertj-core:3.8.0'
+    testCompile 'org.assertj:assertj-core:3.20.1'
 }
 
 build.dependsOn(shadowJar)