diff --git a/Plan/build.gradle b/Plan/build.gradle
index f517f4bff..1077e2332 100644
--- a/Plan/build.gradle
+++ b/Plan/build.gradle
@@ -136,7 +136,7 @@ subprojects {
         testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.1'
         testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.7.1"   // JUnit 5
         testCompile "org.junit.jupiter:junit-jupiter-params:5.7.1"   // JUnit 5, parameterized tests
-        testCompile "org.mockito:mockito-core:3.8.0"                // Mockito Core
+        testCompile "org.mockito:mockito-core:3.9.0"                // Mockito Core
         testCompile "org.mockito:mockito-junit-jupiter:3.8.0"       // Mockito JUnit 5 Extension
         testCompile "org.seleniumhq.selenium:selenium-java:3.141.59" // Selenium (Browser tests)
         testCompile "com.jayway.awaitility:awaitility:1.7.0"         // Awaitility (Concurrent wait conditions)