Add source dependency for servlet api
diff --git a/pom.xml b/pom.xml
index 4fb283f..73c0031 100644
--- a/pom.xml
+++ b/pom.xml
@@ -300,6 +300,12 @@
     </dependency>
 
     <!-- sources artifacts so that we can place them in the features -->
+    <dependency>
+      <groupId>org.eclipse.jetty.toolchain</groupId>
+      <artifactId>jetty-osgi-servlet-api</artifactId>
+      <version>${jetty-osgi-servlet-api-version}</version>
+      <classifier>sources</classifier>
+    </dependency>
      <dependency>
       <groupId>org.eclipse.jetty.osgi</groupId>
       <artifactId>jetty-osgi-boot</artifactId>