diff --git a/build.gradle b/build.gradle
index fa864e46..fc0018db 100644
--- a/build.gradle
+++ b/build.gradle
@@ -55,7 +55,7 @@ subprojects {
 
         testRuntimeOnly("org.junit.platform:junit-platform-launcher")
         testRuntimeOnly "net.bytebuddy:byte-buddy:1.14.12"                 // allows Spock to mock classes (in addition to interfaces)
-        testRuntimeOnly "org.objenesis:objenesis:3.3"                     // Allow Spock to mock classes with constructor arguments
+        testRuntimeOnly "org.objenesis:objenesis:3.4"                     // Allow Spock to mock classes with constructor arguments
         testRuntimeOnly  "org.slf4j:slf4j-jdk14:${slf4jVersion}"          // Runtime implementation of slf4j
     }