diff --git a/core/build.gradle b/core/build.gradle
index b66d3e85..72ffc916 100644
--- a/core/build.gradle
+++ b/core/build.gradle
@@ -5,7 +5,7 @@ dependencies {
     compile project(':util')
     compile group: 'javax.validation', name: 'validation-api', version: '2.0.1.Final'
 
-    testCompile group: 'org.mockito', name: 'mockito-core', version: '1.10.19'
+    testCompile group: 'org.mockito', name: 'mockito-core', version: '5.2.0'
     testCompile group: 'junit', name: 'junit', version: '4.12'
     testCompile group: 'pl.pragmatists', name: 'JUnitParams', version: '1.1.1'
     testCompile group: 'org.quicktheories', name: 'quicktheories', version: '0.26'
diff --git a/persistence/build.gradle b/persistence/build.gradle
index 402e9e0f..4724b814 100644
--- a/persistence/build.gradle
+++ b/persistence/build.gradle
@@ -11,7 +11,7 @@ dependencies {
     compile group: 'org.postgresql', name: 'postgresql', version: '42.2.5'
 
     testCompile project(path: ':core', configuration: 'testSupport')
-    testCompile group: 'org.mockito', name: 'mockito-core', version: '1.10.19'
+    testCompile group: 'org.mockito', name: 'mockito-core', version: '5.2.0'
     testCompile group: 'junit', name: 'junit', version: '4.12'
 
     testSupport project(':application-config')
diff --git a/rest-api/build.gradle b/rest-api/build.gradle
index acc101f7..9cdcab1b 100644
--- a/rest-api/build.gradle
+++ b/rest-api/build.gradle
@@ -53,7 +53,7 @@ dependencies {
     compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jdk8', version: '2.9.8'
 
     testCompile project(path: ':core', configuration: 'testSupport')
-    testCompile group: 'org.mockito', name: 'mockito-core', version: '1.10.19'
+    testCompile group: 'org.mockito', name: 'mockito-core', version: '5.2.0'
     testCompile group: 'junit', name: 'junit', version: '4.12'
     testCompile group: 'org.hamcrest', name: 'hamcrest-all', version: '1.3'
     testCompile(group: 'commons-logging', name: 'commons-logging', version: '1.2')