Add missing dependency
diff --git a/res/maven/tomcat-embed-websocket.pom b/res/maven/tomcat-embed-websocket.pom
index 464e2f0..a9f6070 100644
--- a/res/maven/tomcat-embed-websocket.pom
+++ b/res/maven/tomcat-embed-websocket.pom
@@ -34,6 +34,12 @@
</licenses>
<dependencies>
<dependency>
+ <groupId>org.apache.tomcat</groupId>
+ <artifactId>tomcat-websocket-api</artifactId>
+ <version>@MAVEN.DEPLOY.VERSION@</version>
+ <scope>compile</scope>
+ </dependency>
+ <dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>@MAVEN.DEPLOY.VERSION@</version>