diff --git a/pom.xml b/pom.xml
index 6b0d113..6d58f12 100644
--- a/pom.xml
+++ b/pom.xml
@@ -204,9 +204,10 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>3.1.0</version>
+                        <version>3.1.1</version>
                         <configuration>
                             <overview>${basedir}/src/main/javadoc/overview.html</overview>
+                            <source>1.8</source>
                         </configuration>
                         <executions>
                             <execution>