Upgrading installation guide of xos-core

Change-Id: If0c4f6ebae75587ba3e7da7d450c1e52f78db697
diff --git a/charts/helm.md b/charts/helm.md
index 240aa84..6decfd9 100644
--- a/charts/helm.md
+++ b/charts/helm.md
@@ -20,6 +20,8 @@
 > Code](../developer/getting_the_code.md) guide, you'll find it in
 > `~/cord/helm-charts`.
 
+**IMPORTANT: All the helm commands needs to be executed from within this directory**
+
 ### Add the CORD repository to helm
 
 If you don't want to download the repository, you can just add the OPENCord charts to your helm repo:
diff --git a/charts/xos-core.md b/charts/xos-core.md
index 6e02351..723e833 100644
--- a/charts/xos-core.md
+++ b/charts/xos-core.md
@@ -1,6 +1,7 @@
 # Deploying XOS-CORE
 
 ```shell
+helm dep update xos-core
 helm install -n xos-core xos-core
 ```