diff --git a/gradle/build.gradle b/gradle/build.gradle
index 7f38143..6bc5055 100644
--- a/gradle/build.gradle
+++ b/gradle/build.gradle
@@ -1,6 +1,6 @@
 plugins {
-  id 'com.github.spotbugs' version '4.6.0'
-  id 'com.github.ben-manes.versions' version '0.36.0'
+  id 'com.github.spotbugs' version '4.6.2'
+  id 'com.github.ben-manes.versions' version '0.38.0'
 }
 
 version = '0.1'
diff --git a/gradle/dependencies.gradle b/gradle/dependencies.gradle
index ce533e8..927a01b 100644
--- a/gradle/dependencies.gradle
+++ b/gradle/dependencies.gradle
@@ -14,7 +14,7 @@ libraries.slf4jlog4j = 'org.slf4j:slf4j-log4j12:1.7.26'
 libraries.jaxb_api = 'javax.xml.bind:jaxb-api:2.3.0'
 
 libraries.jackson = [
-    'com.fasterxml.jackson.core:jackson-databind:2.12.0'
+    'com.fasterxml.jackson.core:jackson-databind:2.12.2'
 ]
 
 libraries.retrofit = [
@@ -27,9 +27,9 @@ libraries.retrofit_mock = 'com.squareup.retrofit2:retrofit-mock:2.9.0'
 libraries.mqtt_client = 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.5'
 
 // test libraries
-libraries.junit = 'junit:junit:4.13.1'
-libraries.mockito = 'org.mockito:mockito-core:3.6.28'
+libraries.junit = 'junit:junit:4.13.2'
+libraries.mockito = 'org.mockito:mockito-core:3.8.0'
 
 // check libraries
-libraries.spotbugs_annotations = 'com.github.spotbugs:spotbugs-annotations:4.2.0'
+libraries.spotbugs_annotations = 'com.github.spotbugs:spotbugs-annotations:4.2.2'
 
diff --git a/gradle/gradle/wrapper/gradle-wrapper.properties b/gradle/gradle/wrapper/gradle-wrapper.properties
index 4d9ca16..442d913 100644
--- a/gradle/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists