diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 86e8c39..baaf750 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -20,7 +20,7 @@ public function getConfigTreeBuilder()
         $treeBuilder = new TreeBuilder('l3_cas');
         $treeBuilder->getRootNode()
             ->children()
-            ->scalarNode('host')->defaultValue(300)->end()
+            ->scalarNode('host')->defaultValue('please-configure-cas-host')->end()
             ->scalarNode('path')->defaultValue('')->end()
             ->scalarNode('port')->defaultValue(443)->end()
             ->scalarNode('ca')->defaultNull()->end()