diff --git a/pom.xml b/pom.xml
index 93c41efb..96fe4d54 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,17 +47,17 @@
 
             First the versions for plugins, then those for libraries.
          -->
-        <version.org.apache.maven.plugins.maven-compiler-plugin>3.14.0</version.org.apache.maven.plugins.maven-compiler-plugin><!-- from 2.3.2, 3.13.0 -->
-        <version.org.apache.maven.plugins.maven-deploy-plugin>3.1.4</version.org.apache.maven.plugins.maven-deploy-plugin><!-- from 3.0.0-M1 -->
-        <version.org.apache.maven.plugins.maven-gpg-plugin>3.2.8</version.org.apache.maven.plugins.maven-gpg-plugin><!-- from 1.6 -->
+        <version.org.apache.maven.plugins.maven-compiler-plugin>3.13.0</version.org.apache.maven.plugins.maven-compiler-plugin><!-- from 2.3.2, 3.13.0 -->
+        <version.org.apache.maven.plugins.maven-deploy-plugin>3.0.0-M1</version.org.apache.maven.plugins.maven-deploy-plugin><!-- from 3.0.0-M1 -->
+        <version.org.apache.maven.plugins.maven-gpg-plugin>1.6</version.org.apache.maven.plugins.maven-gpg-plugin><!-- from 1.6 -->
         <version.org.apache.maven.plugins.maven-jar-plugin>3.4.2</version.org.apache.maven.plugins.maven-jar-plugin><!-- from 3.2.0, 3.4.2 -->
-        <version.org.apache.maven.plugins.maven-javadoc-plugin>3.11.2</version.org.apache.maven.plugins.maven-javadoc-plugin><!-- from 3.0.1 -->
+        <version.org.apache.maven.plugins.maven-javadoc-plugin>3.0.1</version.org.apache.maven.plugins.maven-javadoc-plugin><!-- from 3.0.1 -->
         <version.org.apache.maven.plugins.maven-release-plugin>2.5.3</version.org.apache.maven.plugins.maven-release-plugin><!-- from 2.5.3 -->
-        <version.org.apache.maven.plugins.maven-resources-plugin>3.3.1</version.org.apache.maven.plugins.maven-resources-plugin><!-- from 3.1.0 -->
-        <version.org.apache.maven.plugins.maven-shade-plugin>3.6.0</version.org.apache.maven.plugins.maven-shade-plugin><!-- from 2.4.3, 3.5.3 -->
+        <version.org.apache.maven.plugins.maven-resources-plugin>3.1.0</version.org.apache.maven.plugins.maven-resources-plugin><!-- from 3.1.0 -->
+        <version.org.apache.maven.plugins.maven-shade-plugin>3.5.3</version.org.apache.maven.plugins.maven-shade-plugin><!-- from 2.4.3, 3.5.3 -->
         <version.org.apache.maven.plugins.maven-source-plugin>3.3.1</version.org.apache.maven.plugins.maven-source-plugin><!-- from 3.2.1, 3.3.1 -->
         <version.org.apache.maven.plugins.maven-surefire-plugin>3.5.3</version.org.apache.maven.plugins.maven-surefire-plugin>
-        <version.org.apache.maven.plugins.maven-toolchains-plugin>3.2.0</version.org.apache.maven.plugins.maven-toolchains-plugin><!-- from 3.1.0 -->
+        <version.org.apache.maven.plugins.maven-toolchains-plugin>3.1.0</version.org.apache.maven.plugins.maven-toolchains-plugin><!-- from 3.1.0 -->
         <version.org.apache.maven.scm>1.9.5</version.org.apache.maven.scm>
         <version.org.codehaus.mojo>1.0.0</version.org.codehaus.mojo>
         <version.com.helger.maven>8.0.0</version.com.helger.maven>