diff --git a/build.gradle b/build.gradle
index 690a936..9afef0c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,30 +18,33 @@ repositories {
 }
 
 dependencies {
-    implementation 'mysql:mysql-connector-java:8.0.17'
-    implementation 'org.apache.httpcomponents:httpclient:4.5.9'
+    implementation 'mysql:mysql-connector-java:8.0.25'
+    implementation 'org.apache.httpcomponents:httpclient:4.5.13'
     implementation 'com.googlecode.json-simple:json-simple:1.1.1'
-    implementation 'com.google.code.gson:gson:2.8.6'
+    implementation 'com.google.code.gson:gson:2.8.8'
     implementation platform('com.amazonaws:aws-java-sdk-bom:1.11.896')
-    implementation 'com.amazonaws:aws-java-sdk-s3'
-    testImplementation 'junit:junit:4.11'
-    compile 'com.google.api-client:google-api-client:1.23.0'
-    compile 'com.google.oauth-client:google-oauth-client-jetty:1.23.0'
-    compile 'com.google.apis:google-api-services-calendar:v3-rev305-1.23.0'
-    compile 'com.google.guava:guava:29.0-jre'
+    implementation 'com.amazonaws:aws-java-sdk-s3:1.12.53'
+    testImplementation 'junit:junit:4.13.2'
+    compile 'com.google.api-client:google-api-client:1.32.1'
+    compile 'com.google.oauth-client:google-oauth-client-jetty:1.32.1'
+    compile 'com.google.apis:google-api-services-calendar:v3-rev20210804-1.32.1'
+    compile 'com.google.guava:guava:30.1.1-jre'
     compile group: 'commons-cli', name: 'commons-cli', version: '1.3.1'
     compile group: 'net.sourceforge.argparse4j', name: 'argparse4j', version: '0.8.1'
-    compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.13.3'
-    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.3'
+    compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.14.1'
+    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.14.1'
     compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.2.4'
 }
 
 jar {
     manifest {
         attributes(
-                'Main-Class': 'de.jeyp91.App'
+            'Main-Class': 'de.jeyp91.App'
         )
     }
+    manifest.attributes(
+        'Multi-Release': 'true'
+    )
     from {
         configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
     }
diff --git a/src/main/java/de/jeyp91/googlecalendar/GoogleCalendarConnector.java b/src/main/java/de/jeyp91/googlecalendar/GoogleCalendarConnector.java
index d6d407b..2e00b69 100644
--- a/src/main/java/de/jeyp91/googlecalendar/GoogleCalendarConnector.java
+++ b/src/main/java/de/jeyp91/googlecalendar/GoogleCalendarConnector.java
@@ -8,7 +8,7 @@ import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.JsonFactory;
-import com.google.api.client.json.jackson2.JacksonFactory;
+import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.client.util.DateTime;
 import com.google.api.client.util.store.FileDataStoreFactory;
 import com.google.api.services.calendar.CalendarScopes;
@@ -31,7 +31,7 @@ import java.util.List;
 
 public class GoogleCalendarConnector {
     private static final String APPLICATION_NAME = "Google Calendar API Java Quickstart";
-    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
+    private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
     private static final String TOKENS_DIRECTORY_PATH = "tokens";
 
     /**
diff --git a/src/main/java/de/jeyp91/googlecalendar/Utils.java b/src/main/java/de/jeyp91/googlecalendar/Utils.java
index 7ddbfa4..d16abe3 100644
--- a/src/main/java/de/jeyp91/googlecalendar/Utils.java
+++ b/src/main/java/de/jeyp91/googlecalendar/Utils.java
@@ -22,7 +22,7 @@ import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.http.HttpTransport;
 import com.google.api.client.json.JsonFactory;
-import com.google.api.client.json.jackson2.JacksonFactory;
+import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.client.util.DateTime;
 import com.google.api.client.util.store.DataStoreFactory;
 import com.google.api.client.util.store.FileDataStoreFactory;
@@ -52,7 +52,7 @@ public class Utils {
     private static FileDataStoreFactory dataStoreFactory;
 
     /** Global instance of the JSON factory. */
-    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
+    private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
 
     /** Global instance of the HTTP transport. */
     private static HttpTransport httpTransport;
diff --git a/src/main/java/de/jeyp91/tippligaforum/MatchesListCreator.java b/src/main/java/de/jeyp91/tippligaforum/MatchesListCreator.java
index 758e29b..545951f 100644
--- a/src/main/java/de/jeyp91/tippligaforum/MatchesListCreator.java
+++ b/src/main/java/de/jeyp91/tippligaforum/MatchesListCreator.java
@@ -3,7 +3,6 @@ package de.jeyp91.tippligaforum;
 import com.google.gson.*;
 import de.jeyp91.S3Provider;
 import de.jeyp91.apifootball.APIFootballMatch;
-import netscape.javascript.JSObject;
 import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;