diff --git a/ocpp-common/build.gradle b/ocpp-common/build.gradle
index b2b08469..db8eb74b 100644
--- a/ocpp-common/build.gradle
+++ b/ocpp-common/build.gradle
@@ -8,7 +8,7 @@ dependencies {
     compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1'
 
     testCompile 'junit:junit:4.13.2'
-    testCompile 'org.mockito:mockito-core:4.11.0'
+    testCompile 'org.mockito:mockito-core:5.21.0'
     testCompile 'org.hamcrest:hamcrest-all:1.3'
 }
 
diff --git a/ocpp-json/build.gradle b/ocpp-json/build.gradle
index 6eead7e2..da8d97d2 100644
--- a/ocpp-json/build.gradle
+++ b/ocpp-json/build.gradle
@@ -8,7 +8,7 @@ dependencies {
     compile 'org.java-websocket:Java-WebSocket:1.6.0'
 
     testCompile 'junit:junit:4.13.2'
-    testCompile 'org.mockito:mockito-core:4.11.0'
+    testCompile 'org.mockito:mockito-core:5.21.0'
     testCompile 'org.hamcrest:hamcrest-core:3.0'
 }
 
diff --git a/ocpp-v1_6-json/build.gradle b/ocpp-v1_6-json/build.gradle
index 07bbaf89..9bec5a8a 100644
--- a/ocpp-v1_6-json/build.gradle
+++ b/ocpp-v1_6-json/build.gradle
@@ -7,7 +7,7 @@ dependencies {
     compile project(':ocpp-json')
 
     testCompile 'junit:junit:4.13.2'
-    testCompile 'org.mockito:mockito-core:4.11.0'
+    testCompile 'org.mockito:mockito-core:5.21.0'
     testCompile 'org.hamcrest:hamcrest-core:3.0'
 }
 
diff --git a/ocpp-v1_6-soap/build.gradle b/ocpp-v1_6-soap/build.gradle
index 77aa8ac8..1f16ca55 100644
--- a/ocpp-v1_6-soap/build.gradle
+++ b/ocpp-v1_6-soap/build.gradle
@@ -7,7 +7,7 @@ dependencies {
     compile group: 'javax.xml.soap', name: 'javax.xml.soap-api', version: '1.4.0'
 
     testCompile 'junit:junit:4.13.2'
-    testCompile 'org.mockito:mockito-core:4.11.0'
+    testCompile 'org.mockito:mockito-core:5.21.0'
     testCompile 'org.hamcrest:hamcrest-core:3.0'
 }
 
diff --git a/ocpp-v1_6/build.gradle b/ocpp-v1_6/build.gradle
index 725da9ed..62c84e1a 100644
--- a/ocpp-v1_6/build.gradle
+++ b/ocpp-v1_6/build.gradle
@@ -6,7 +6,7 @@ dependencies {
     compile project(':ocpp-common')
 
     testCompile 'junit:junit:4.13.2'
-    testCompile 'org.mockito:mockito-core:4.11.0'
+    testCompile 'org.mockito:mockito-core:5.21.0'
     testCompile 'org.hamcrest:hamcrest-core:3.0'
 }
 
diff --git a/ocpp-v2-test/build.gradle b/ocpp-v2-test/build.gradle
index 7e70f561..612cb11f 100644
--- a/ocpp-v2-test/build.gradle
+++ b/ocpp-v2-test/build.gradle
@@ -11,7 +11,7 @@ dependencies {
     compile 'com.google.code.findbugs:jsr305:3.0.2'
 
     testCompile 'junit:junit:4.13.2'
-    testCompile 'org.mockito:mockito-core:4.11.0'
+    testCompile 'org.mockito:mockito-core:5.21.0'
     testCompile 'org.hamcrest:hamcrest-core:3.0'
 }
 
diff --git a/ocpp-v2/build.gradle b/ocpp-v2/build.gradle
index 527cb4c0..f38597a4 100644
--- a/ocpp-v2/build.gradle
+++ b/ocpp-v2/build.gradle
@@ -9,7 +9,7 @@ dependencies {
     compile 'com.google.code.findbugs:jsr305:3.0.2'
 
     testCompile 'junit:junit:4.13.2'
-    testCompile 'org.mockito:mockito-core:4.11.0'
+    testCompile 'org.mockito:mockito-core:5.21.0'
     testCompile 'org.hamcrest:hamcrest-core:3.0'
 }