diff --git a/pom.xml b/pom.xml
index 45939d1..1e3357b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,32 +48,32 @@
     <enforcer.skip>false</enforcer.skip>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <maven.version>3.6.3</maven.version>
+    <maven.version>3.8.8</maven.version>
     <nexus.url>https://oss.sonatype.org</nexus.url>
     <repository.url>git@github.com:${project.github.repository}.git</repository.url>
     <!-- value comes from property git.commit.author.time -->
     <project.build.outputTimestamp>${git.commit.author.time}</project.build.outputTimestamp>
-    <version.antrun.plugin>3.0.0</version.antrun.plugin>
-    <version.clean.plugin>3.2.0</version.clean.plugin>
-    <version.compiler.plugin>3.11.0</version.compiler.plugin>
-    <version.dependency.plugin>3.5.0</version.dependency.plugin>
+    <version.antrun.plugin>3.1.0</version.antrun.plugin>
+    <version.clean.plugin>3.3.2</version.clean.plugin>
+    <version.compiler.plugin>3.12.1</version.compiler.plugin>
+    <version.dependency.plugin>3.6.1</version.dependency.plugin>
     <version.deploy.plugin>3.1.1</version.deploy.plugin>
-    <version.enforcer.plugin>3.2.1</version.enforcer.plugin>
-    <version.enforcer.extra.rules>1.6.1</version.enforcer.extra.rules>
-    <version.failsafe.plugin>3.0.0</version.failsafe.plugin>
-    <version.formatter.plugin>2.22.0</version.formatter.plugin>
+    <version.enforcer.plugin>3.4.1</version.enforcer.plugin>
+    <version.enforcer.extra.rules>1.7.0</version.enforcer.extra.rules>
+    <version.failsafe.plugin>3.2.5</version.failsafe.plugin>
+    <version.formatter.plugin>2.23.0</version.formatter.plugin>
     <version.git.plugin>4.9.10</version.git.plugin>
-    <version.gpg.plugin>3.0.1</version.gpg.plugin>
-    <version.impsort.plugin>1.8.0</version.impsort.plugin>
+    <version.gpg.plugin>3.1.0</version.gpg.plugin>
+    <version.impsort.plugin>1.9.0</version.impsort.plugin>
     <version.install.plugin>3.1.1</version.install.plugin>
-    <version.javadoc.plugin>3.5.0</version.javadoc.plugin>
+    <version.javadoc.plugin>3.6.3</version.javadoc.plugin>
     <version.jar.plugin>3.3.0</version.jar.plugin>
-    <version.license.plugin>4.1</version.license.plugin>
+    <version.license.plugin>4.3</version.license.plugin>
     <version.nexus.plugin>1.6.13</version.nexus.plugin>
     <version.resources.plugin>3.3.1</version.resources.plugin>
-    <version.source.plugin>3.2.1</version.source.plugin>
-    <version.surefire.plugin>3.0.0</version.surefire.plugin>
-    <version.versions.plugin>2.15.0</version.versions.plugin>
+    <version.source.plugin>3.3.0</version.source.plugin>
+    <version.surefire.plugin>3.2.5</version.surefire.plugin>
+    <version.versions.plugin>2.16.2</version.versions.plugin>
   </properties>
 
   <licenses>