diff --git a/README.md b/README.md
index 13bba5c..1eb6be8 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,9 @@ Vouch sits between the beacon node(s) and signer(s) in an Ethereum 2 validating
   - [Account manager](docs/accountmanager.md) Details of the supported account managers
   - [Graffiti](docs/graffiti.md) Details of the graffiti provider
 
+## Known issues
+  - lighthouse does not yet implement server-sent events.  As a result, if you are using Lighthouse you will see an occasional error in the logs that looks like: `{"level":"error","service":"client","impl":"standardv1","error":"could not connect to stream","time":"2020-11-26T08:01:09Z","message":"Failed to subscribe to event stream"}`
+
 ## Maintainers
 
 Jim McDonald: [@mcdee](https://github.com/mcdee).