diff --git a/build.gradle b/build.gradle
index 958f45d..74dc4c9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -154,7 +154,7 @@ dependencies {
 	testImplementation('org.eclipse.jetty:jetty-servlet:9.3.11.v20160721') {
 		exclude group: "javax.servlet", module: "javax.servlet-api" // upgrading breaks tests
 	}
-	testImplementation 'org.mockito:mockito-core:3.0.0'
+	testImplementation 'org.mockito:mockito-core:5.19.0'
 	testImplementation 'org.apache.commons:commons-lang3:3.5'
 	testImplementation('com.github.kbase:java_test_utilities:0.1.0') {
 		exclude group: 'com.fasterxml.jackson.core'  // upgrading breaks stuff