diff --git a/storage/mongodb/README.md b/storage/mongodb/README.md
index 955f21e8..4565bc64 100644
--- a/storage/mongodb/README.md
+++ b/storage/mongodb/README.md
@@ -16,13 +16,23 @@ Install
 -------
 
 Run the following command in your Node-RED user directory - typically `~/.node-red`
-
+```
         npm install node-red-node-mongodb
+```
+Note that this package requires a MongoDB client package at least version 3.6.1 - if you have an older (version 2) client,
+you may need to remove that before installing this
+```
+        npm remove mongodb
+        npm install node-red-node-mongodb
+```
 
 Usage
 -----
 
-Nodes to save and retrieve data in a local MongoDB instance.
+Nodes to save and retrieve data in a MongoDB instance - the database server can be local (mongodb//:localhost:27017), remote (mongodb://hostname.network:27017), 
+and sharded cluster (mongodb+srv://clustername.network).  
+
+Reference [MongoDB docs](https://docs.mongodb.com/manual/reference/connection-string/) to see which connection method (host or clustered) to use for your MongoDB instance. 
 
 ### Input