diff --git a/ARSnova-checkstyle-checker.xml b/ARSnova-checkstyle-checker.xml
index a589cfaccfcc5a1c7a950630060062680846fad1..19f4cf10ab679cf5383e150d9e76b3b9777c4827 100644
--- a/ARSnova-checkstyle-checker.xml
+++ b/ARSnova-checkstyle-checker.xml
@@ -70,7 +70,6 @@
 
     <module name="TreeWalker">
 
-        <property name="cacheFile" value="${checkstyle.cache.file}"/>
         <property name="tabWidth" value="4"/>
 
         <!-- Checks for Javadoc comments.                     -->
diff --git a/pom.xml b/pom.xml
index 6337cfdb36d4cfb949574d56b7f8e1ae957f4bfa..85c59c7d1202280fd71f01ace54cfe5d233c8c7d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -70,7 +70,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-javadoc-plugin</artifactId>
-				<version>3.0.1</version>
+				<version>3.1.1</version>
 				<configuration></configuration>
 			</plugin>
 		</plugins>
@@ -188,12 +188,12 @@
 		<dependency>
 			<groupId>com.google.guava</groupId>
 			<artifactId>guava</artifactId>
-			<version>27.1-jre</version>
+			<version>28.0-jre</version>
 		</dependency>
 		<dependency>
 			<groupId>cglib</groupId>
 			<artifactId>cglib</artifactId>
-			<version>3.2.12</version>
+			<version>3.3.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.slf4j</groupId>
@@ -236,12 +236,12 @@
 		<dependency>
 			<groupId>org.pac4j</groupId>
 			<artifactId>pac4j-oauth</artifactId>
-			<version>3.6.1</version>
+			<version>3.7.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.pac4j</groupId>
 			<artifactId>pac4j-oidc</artifactId>
-			<version>3.6.1</version>
+			<version>3.7.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.pac4j</groupId>
@@ -328,7 +328,7 @@
 		<dependency>
 			<groupId>org.checkerframework</groupId>
 			<artifactId>checker-qual</artifactId>
-			<version>2.8.0</version>
+			<version>2.10.0</version>
 		</dependency>
 	</dependencies>
 
@@ -375,7 +375,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-site-plugin</artifactId>
-				<version>3.7.1</version>
+				<version>3.8.2</version>
 				<configuration>
 					<locales>en</locales>
 				</configuration>
@@ -413,7 +413,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-checkstyle-plugin</artifactId>
-				<version>3.0.0</version>
+				<version>3.1.0</version>
 				<configuration>
 					<configLocation>ARSnova-checkstyle-checker.xml</configLocation>
 				</configuration>
@@ -475,7 +475,7 @@
 			<plugin>
 				<groupId>pl.project13.maven</groupId>
 				<artifactId>git-commit-id-plugin</artifactId>
-				<version>2.2.6</version>
+				<version>3.0.1</version>
 				<executions>
 					<execution>
 						<goals>