diff --git a/README.md b/README.md
index 7d33a20..bf958ed 100644
--- a/README.md
+++ b/README.md
@@ -164,7 +164,7 @@ can be interconnected to form a single "virtual" server. This can be used to
 increase the capacity of the signaling server or provide a failover setup.
 
 For that a central NATS server / cluster must be used by all instances. Each
-instance must running a GRPC server (enable `listening` in section `grpc` and
+instance must run a GRPC server (enable `listening` in section `grpc` and
 optionally setup certificate, private key and CA). The list of other GRPC
 targets must be configured as `targets` in section `grpc` or can be retrieved
 from an etcd cluster. See `server.conf.in` in section `grpc` for configuration