diff --git a/go.mod b/go.mod
index 49c78b5d2..a546fe093 100644
--- a/go.mod
+++ b/go.mod
@@ -16,6 +16,7 @@ require (
 	github.com/go-stack/stack v1.8.0 // indirect
 	github.com/golang/mock v1.2.0
 	github.com/golang/protobuf v1.3.0
+	github.com/gorilla/handlers v1.4.0
 	github.com/gorilla/mux v1.7.0
 	github.com/harmony-one/bls v0.0.1
 	github.com/hashicorp/golang-lru v0.5.1
diff --git a/scripts/go_executable_build.sh b/scripts/go_executable_build.sh
index ff4a72e13..72778c36f 100755
--- a/scripts/go_executable_build.sh
+++ b/scripts/go_executable_build.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+export GO111MODULE=on
+
 declare -A SRC
 SRC[harmony]=cmd/harmony/main.go
 SRC[txgen]=cmd/client/txgen/main.go