diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..685fc84
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,3 @@
+voltha-bbsim_*
+.gitignore
+.gitreview
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 32fcb27..78fc857 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,6 @@
 /bbsim
 protos/openolt.pb.go
 coverage.txt
+.idea/
+api/bbsim.pb.go
+api/bbsim.pb.gw.go
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index 571f888..b57fadc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@
 # bbsim dockerfile
 
 # builder parent
-FROM golang:1.10-stretch as builder
+FROM golang:1.12-stretch as builder
 
 # install prereqs
 ENV PROTOC_VERSION 3.6.1
@@ -29,26 +29,39 @@
  && mv /tmp/protoc3/bin/* /usr/local/bin/ \
  && mv /tmp/protoc3/include/* /usr/local/include/ \
  && go get -v github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway \
- && go get -v github.com/golang/protobuf/protoc-gen-go 
+ && go get -v github.com/golang/protobuf/protoc-gen-go
+
+WORKDIR /go/src/gerrit.opencord.org/voltha-bbsim
+ENV GO111MODULE=on
+ENV GOPROXY=https://proxy.golang.org
+
+# get dependencies
+COPY go.mod go.sum ./
+RUN go mod download
+
+# build the protos
+COPY Makefile ./
+COPY openolt.proto ./
+COPY protos/ ./protos
+RUN make protos/openolt.pb.go
+COPY api/ ./api
+RUN make bbsimapi
 
 # copy and build
-WORKDIR /go/src/gerrit.opencord.org/voltha-bbsim
-COPY . /go/src/gerrit.opencord.org/voltha-bbsim
-
-RUN make bbsim
+COPY . ./
+RUN GO111MODULE=on go build -i -v -o bbsim
 
 # runtime parent
-FROM golang:1.10-stretch
+FROM golang:1.12-stretch
 
 # runtime prereqs
 # the symlink on libpcap is because both alpine and debian come with 1.8.x, but
 # debian symlinks it to 0.8 for historical reasons:
 # https://packages.debian.org/stretch/libpcap0.8-dev
 RUN apt-get update \
- && apt-get install -y libpcap-dev wpasupplicant isc-dhcp-server network-manager\
+ && apt-get install -y libpcap-dev isc-dhcp-server network-manager\
  && ln -s /usr/lib/libpcap.so.1.8.1 /usr/lib/libpcap.so.0.8
 
-COPY ./config/wpa_supplicant.conf /etc/wpa_supplicant/
 COPY ./config/isc-dhcp-server /etc/default/
 COPY ./config/dhcpd.conf /etc/dhcp/
 RUN mv /usr/sbin/dhcpd /usr/local/bin/ \
diff --git a/Makefile b/Makefile
index b302c55..baadf51 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,8 @@
 BBSIM_DEPS  = $(wildcard ./*.go)
 VERSION     ?= $(shell cat ./VERSION)
 DOCKER_TAG  ?= ${VERSION}
+DOCKER_ORG  ?= voltha/
+DOCKER_REGISTRY ?= ""
 
 ## Docker related
 DOCKER_BUILD_ARGS        ?=
@@ -26,21 +28,14 @@
 DOCKER_LABEL_COMMIT_DATE ?= $(shell git diff-index --quiet HEAD -- && git show -s --format=%cd --date=iso-strict HEAD || echo "unknown" )
 DOCKER_LABEL_BUILD_DATE  ?= $(shell date -u "+%Y-%m-%dT%H:%M:%SZ")
 
-.PHONY: dep test clean docker
+bbsim: dep protos/openolt.pb.go bbsimapi
+	GO111MODULE=on go build -i -v -o $@
 
-prereq:
-	go get -v google.golang.org/grpc
-	go get -v github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
-	go get -v github.com/golang/protobuf/protoc-gen-go
-	go get -v github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger
-	go get -v github.com/google/gopacket
-	go get -u -v github.com/opencord/omci-sim
-
-bbsim: prereq protos/openolt.pb.go bbsimapi dep
-	go build -i -v -o $@
-
-dep: protos/openolt.pb.go bbsimapi
-	go get -v -d ./...
+dep:
+	GO111MODULE=off go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
+	GO111MODULE=off go get -v github.com/golang/protobuf/protoc-gen-go
+	GO111MODULE=off go get -v github.com/google/gopacket
+	GO111MODULE=on go mod download all
 
 protos/openolt.pb.go: openolt.proto
 	@protoc -I . \
@@ -66,9 +61,9 @@
 	--swagger_out=logtostderr=true,allow_delete_body=true:api/swagger/ \
 	bbsim.proto
 
-test:
-	go test -v ./...
-	go test -v ./... -cover
+test: dep protos/openolt.pb.go bbsimapi
+	GO111MODULE=on go test -v ./...
+	GO111MODULE=on go test -v ./... -cover
 
 fmt:
 	go fmt ./...
@@ -87,8 +82,10 @@
 	        api/swagger/*.json
 
 docker-build:
-	docker build -t voltha/voltha-bbsim:${DOCKER_TAG} .
-	docker save voltha/voltha-bbsim:${DOCKER_TAG} -o voltha-bbsim_${DOCKER_TAG}.tgz
+	docker build -t ${DOCKER_REGISTRY}${DOCKER_ORG}voltha-bbsim:${DOCKER_TAG} .
+
+docker-save:
+	docker save ${DOCKER_REGISTRY}${DOCKER_ORG}voltha-bbsim:${DOCKER_TAG} -o voltha-bbsim_${DOCKER_TAG}.tgz
 
 docker-push:
-	docker push voltha/voltha-bbsim:${DOCKER_TAG}
\ No newline at end of file
+	docker push ${DOCKER_REGISTRY}${DOCKER_ORG}voltha-bbsim:${DOCKER_TAG}
\ No newline at end of file
diff --git a/core/tester.go b/core/tester.go
index fe2aa39..d35a55b 100644
--- a/core/tester.go
+++ b/core/tester.go
@@ -17,6 +17,7 @@
 package core
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"os/exec"
@@ -190,12 +191,15 @@
 		logger.Error("Fail to set %s up: %s", veth, err)
 		return err
 	}
-	cmd := "/usr/local/bin/dhcpd"
+	dhcp := "/usr/local/bin/dhcpd"
 	conf := "/etc/dhcp/dhcpd.conf"
 	logfile := "/tmp/dhcplog"
-	err = exec.Command(cmd, "-cf", conf, veth, "-tf", logfile).Run()
+	var stderr bytes.Buffer
+	cmd := exec.Command(dhcp, "-cf", conf, veth, "-tf", logfile)
+	cmd.Stderr = &stderr
+	err = cmd.Run()
 	if err != nil {
-		logger.Error("Fail to activateDHCP Server (): %s", err)
+		logger.Error("Fail to activateDHCP Server (): %s, %s", err, stderr.String())
 		return err
 	}
 	logger.Info("DHCP Server is successfully activated !")
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..40928b7
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,17 @@
+module gerrit.opencord.org/voltha-bbsim
+
+go 1.12
+
+require (
+	github.com/Shopify/sarama v1.23.1 // indirect
+	github.com/gfremex/logrus-kafka-hook v0.0.0-20180109031623-f62e125fcbfe
+	github.com/golang/protobuf v1.3.2
+	github.com/google/gopacket v1.1.17
+	github.com/grpc-ecosystem/grpc-gateway v1.9.5
+	github.com/opencord/omci-sim v0.0.0-20190717165025-5ff7bb17f1e9
+	github.com/sirupsen/logrus v1.4.2
+	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80
+	golang.org/x/sync v0.0.0-20190423024810-112230192c58
+	google.golang.org/genproto v0.0.0-20190716160619-c506a9f90610
+	google.golang.org/grpc v1.22.1
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..b137f17
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,111 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/DataDog/zstd v1.3.6-0.20190409195224-796139022798 h1:2T/jmrHeTezcCM58lvEQXs0UpQJCo5SoGAcg+mbSTIg=
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+github.com/Shopify/sarama v1.23.1 h1:XxJBCZEoWJtoWjf/xRbmGUpAmTZGnuuF0ON0EvxxBrs=
+github.com/Shopify/sarama v1.23.1/go.mod h1:XLH1GYJnLVE0XCr6KdJGVJRTwY30moWNJ4sERjXX6fs=
+github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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