diff --git a/pom.xml b/pom.xml
index a26d095..a29cbf8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -274,7 +274,7 @@
                         <configuration>
                             <quiet>true</quiet>
                             <doclint>none</doclint>
-                            <failOnWarnings>false</failOnWarnings>
+                            <failOnWarnings>true</failOnWarnings>
                             <links>
                                 <link>https://javadoc.io/doc/com.vaadin/vaadin-platform-javadoc/${vaadin.version}</link>
                             </links>
diff --git a/src/main/java/com/flowingcode/vaadin/addons/xterm/ITerminal.java b/src/main/java/com/flowingcode/vaadin/addons/xterm/ITerminal.java
index a0f16a0..2fdfc9a 100644
--- a/src/main/java/com/flowingcode/vaadin/addons/xterm/ITerminal.java
+++ b/src/main/java/com/flowingcode/vaadin/addons/xterm/ITerminal.java
@@ -109,7 +109,6 @@ public interface ITerminal extends Serializable {
    * @param data The data to write to the terminal. This can either be raw bytes given as Uint8Array
    *     from the pty or a string. Raw bytes will always be treated as UTF-8 encoded, string data as
    *     UTF-16.
-   * @param callback Optional callback that fires when the data was processed by the parser.
    */
   void writeln(String data);