diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index 8154c46..68d7164
--- a/pom.xml
+++ b/pom.xml
@@ -184,7 +184,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>2.9.1</version>
+                        <version>3.6.3</version>
                         <executions>
                             <execution>
                                 <id>attach-javadocs</id>