diff --git a/README.md b/README.md
index fd21b719d..dde4068a3 100644
--- a/README.md
+++ b/README.md
@@ -47,3 +47,15 @@ When you have multiple versions you may want to tag some version as **latest**:
 # tag the version VERSION of project PROJECT as latest
 curl -X PUT http://localhost:8000/api/PROJECT/VERSION/tags/latest
 ```
+
+
+## Advanced config.json
+
+It is possible to configure some things after the fact.
+
+1. Create a `config.json` file
+2. Mount it inside your docker container `--volume /path/to/config.json:/var/www/html/config.json`
+
+Supported config options:
+
+* headerHTML
diff --git a/web/src/components/Layout.vue b/web/src/components/Layout.vue
index 007085ef6..9e16af2b1 100644
--- a/web/src/components/Layout.vue
+++ b/web/src/components/Layout.vue
@@ -42,7 +42,7 @@ export default {
     }
   },
   async created() {
-    const config = ProjectRepository.getConfig()
+    const config = await ProjectRepository.getConfig()
     if (config.hasOwnProperty('headerHTML')){
       this.header = config.headerHTML
     }