diff --git a/go.mod b/go.mod
index 63549471b39a6d26dda3dd2697456e3e726cb62c..c68f9b405cdfa527bfbc4c23737c235adf20f23e 100644
--- a/go.mod
+++ b/go.mod
@@ -9,8 +9,9 @@ require (
 	github.com/ethereum/go-ethereum v1.8.27
 	github.com/gdamore/tcell v1.1.2
 	github.com/go-zeromq/zmq4 v0.4.0
-	github.com/golang/protobuf v1.3.1
+	github.com/golang/protobuf v1.3.1 // indirect
 	github.com/google/open-location-code/go v0.0.0-20190603181809-cf814bded323
+	github.com/gorilla/websocket v1.4.0
 	github.com/iotaledger/iota.go v1.0.0-beta.7
 	github.com/labstack/echo v3.3.10+incompatible
 	github.com/labstack/gommon v0.2.9 // indirect
diff --git a/go.sum b/go.sum
index ee4ac660ad837afc3f3ea5565fc03957c04d332a..771f0549ffd393c98b879747ad602b3019761855 100644
--- a/go.sum
+++ b/go.sum
@@ -36,6 +36,8 @@ github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/open-location-code/go v0.0.0-20190603181809-cf814bded323 h1:s+TV4ZPsmXNvFxr9gzRTOlqf7DT862ieiOGRWA9M3oM=
 github.com/google/open-location-code/go v0.0.0-20190603181809-cf814bded323/go.mod h1:eJfRN6aj+kR/rnua/rw9jAgYhqoMHldQkdTi+sePRKk=
+github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
+github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542/go.mod h1:Ow0tF8D4Kplbc8s8sSb3V2oUCygFHVp8gC3Dn6U4MNI=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=