diff --git a/pom.xml b/pom.xml
index 4037fd1..e7c7655 100644
--- a/pom.xml
+++ b/pom.xml
@@ -224,38 +224,6 @@
         <artifactId>maven-source-plugin</artifactId>
       </plugin>
       <!-- Kotlin -->
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>build-helper-maven-plugin</artifactId>
-        <version>3.6.0</version>
-        <executions>
-          <execution>
-            <goals>
-              <goal>add-source</goal>
-            </goals>
-            <phase>generate-sources</phase>
-            <configuration>
-              <sources>
-                <source>src/main/java</source>
-                <source>src/main/kotlin</source>
-              </sources>
-            </configuration>
-          </execution>
-          <execution>
-            <id>add-test-source</id>
-            <goals>
-              <goal>add-test-source</goal>
-            </goals>
-            <phase>generate-test-sources</phase>
-            <configuration>
-              <sources>
-                <source>src/test/java</source>
-                <source>src/test/kotlin</source>
-              </sources>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>flatten-maven-plugin</artifactId>
@@ -271,7 +239,7 @@
       <plugin>
         <groupId>org.jetbrains.dokka</groupId>
         <artifactId>dokka-maven-plugin</artifactId>
-        <version>1.9.10</version>
+        <version>1.9.20</version>
         <configuration>
           <failOnWarning>false</failOnWarning>
           <reportUndocumented>false</reportUndocumented>
@@ -333,6 +301,8 @@
         </configuration>
       </plugin>
     </plugins>
+    <sourceDirectory>src/main/kotlin</sourceDirectory>
+    <testSourceDirectory>src/test/kotlin</testSourceDirectory>
   </build>
 
   <profiles>