diff --git a/Makefile b/Makefile
index 4f6c609..f2bf764 100644
--- a/Makefile
+++ b/Makefile
@@ -3,36 +3,9 @@ PKG := "gitlab.lehouerou.net/laurent/$(PROJECT_NAME)"
 PKG_LIST := $(shell go list ${PKG}/... | grep -v /vendor/)
 GO_FILES := $(shell find . -name '*.go' | grep -v /vendor/ | grep -v _test.go)
 
-.PHONY: all dep build clean test coverage coverhtml lint
+.PHONY: all dep build
 
 all: build
 
-lint: ## Lint the files
-	@golint -set_exit_status ${PKG_LIST}
-
-test: ## Run unittests
-	@go test -short ${PKG_LIST}
-
-race: dep ## Run data race detector
-	@go test -race -short ${PKG_LIST}
-
-msan: dep ## Run memory sanitizer
-	@go test -msan -short ${PKG_LIST}
-
-coverage: ## Generate global code coverage report
-	./tools/coverage.sh;
-
-coverhtml: ## Generate global code coverage report in HTML
-	./tools/coverage.sh html;
-
-dep: ## Get the dependencies
-	@go get -v -d ./...
-
-build: dep ## Build the binary file
-	@go build -i -v $(PKG)/cmd/dnsupdater
-
-clean: ## Remove previous build
-	@rm -f $(PROJECT_NAME)
-
-help: ## Display this help screen
-	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
\ No newline at end of file
+build: ## Build the binary file
+	@go build -i -v $(PKG)/cmd/dnsupdater
\ No newline at end of file
diff --git a/cmd/dnsupdater/main.go b/cmd/dnsupdater/main.go
index e6b3135..1325445 100644
--- a/cmd/dnsupdater/main.go
+++ b/cmd/dnsupdater/main.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"gopkg.in/gomail.v2"
 	"net/http"
 	"os"
 	"path"
@@ -14,14 +15,12 @@ import (
 	"gitlab.lehouerou.net/laurent/dnsupdater/internal/outboundip"
 	"gitlab.lehouerou.net/laurent/dnsupdater/internal/outboundip/ddwrt"
 
-	"golang.org/x/xerrors"
-
 	"cdr.dev/slog"
-
 	"cdr.dev/slog/sloggers/sloghuman"
 	"github.com/dghubble/sling"
 	"github.com/matryer/try"
 	"github.com/urfave/cli"
+	"golang.org/x/xerrors"
 )
 
 var (
diff --git a/go.mod b/go.mod
index f398e52..622de3c 100644
--- a/go.mod
+++ b/go.mod
@@ -11,5 +11,5 @@ require (
 	github.com/urfave/cli v1.20.0
 	golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
-	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
+	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df // indirect
 )
diff --git a/tools/coverage.sh b/tools/coverage.sh
deleted file mode 100644
index 529bf73..0000000
--- a/tools/coverage.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-#
-# Code coverage generation
-
-COVERAGE_DIR="${COVERAGE_DIR:-coverage}"
-PKG_LIST=$(go list ./... | grep -v /vendor/)
-
-# Create the coverage files directory
-mkdir -p "$COVERAGE_DIR";
-
-# Create a coverage file for each package
-for package in ${PKG_LIST}; do
-    go test -covermode=count -coverprofile "${COVERAGE_DIR}/${package##*/}.cov" "$package" ;
-done ;
-
-# Merge the coverage profile files
-echo 'mode: count' > "${COVERAGE_DIR}"/coverage.cov ;
-tail -q -n +2 "${COVERAGE_DIR}"/*.cov >> "${COVERAGE_DIR}"/coverage.cov ;
-
-# Display the global code coverage
-go tool cover -func="${COVERAGE_DIR}"/coverage.cov ;
-
-# If needed, generate HTML report
-if [ "$1" == "html" ]; then
-    go tool cover -html="${COVERAGE_DIR}"/coverage.cov -o coverage.html ;
-fi
-
-# Remove the coverage files directory
-rm -rf "$COVERAGE_DIR";
\ No newline at end of file