diff --git a/pom.xml b/pom.xml
index bbe09cc..e80831e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,12 +62,12 @@
         <readyForAutoVersion>false</readyForAutoVersion>
 
         <!-- plugin versions -->
-        <flatten-maven-plugin.version>1.7.1</flatten-maven-plugin.version>
-        <maven-surefire-plugin.version>3.5.3</maven-surefire-plugin.version>
-        <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
+        <flatten-maven-plugin.version>1.7.3</flatten-maven-plugin.version>
+        <maven-surefire-plugin.version>3.5.4</maven-surefire-plugin.version>
+        <maven-source-plugin.version>3.4.0</maven-source-plugin.version>
         <maven-install-plugin.version>3.1.4</maven-install-plugin.version>
         <maven-deploy-plugin.version>3.1.4</maven-deploy-plugin.version>
-        <maven-javadoc-plugin.version>3.11.2</maven-javadoc-plugin.version>
+        <maven-javadoc-plugin.version>3.12.0</maven-javadoc-plugin.version>
         <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
         <central-publishing-maven-plugin.version>0.8.0</central-publishing-maven-plugin.version>