diff --git a/.dockerignore b/.dockerignore
index a79fd48b6..7f1710076 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,3 +1,8 @@
 dist/
 !dist/traefik
 site/
+vendor/
+.github/
+.semaphoreci/
+.travis/
+.idea/
diff --git a/build.Dockerfile b/build.Dockerfile
index e063c839f..f060e91f3 100644
--- a/build.Dockerfile
+++ b/build.Dockerfile
@@ -21,8 +21,8 @@ RUN mkdir -p /usr/local/bin \
 # Download golangci-lint binary to bin folder in $GOPATH
 RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b $GOPATH/bin v1.23.6
 
-# Download golangci-lint and misspell binary to bin folder in $GOPATH
-RUN GO111MODULE=off go get github.com/client9/misspell/cmd/misspell
+# Download misspell binary to bin folder in $GOPATH
+RUN  curl -sfL https://raw.githubusercontent.com/client9/misspell/master/install-misspell.sh | bash -s -- -b $GOPATH/bin v0.3.4
 
 # Download goreleaser binary to bin folder in $GOPATH
 RUN curl -sfL https://install.goreleaser.com/github.com/goreleaser/goreleaser.sh | sh
diff --git a/pkg/tracing/elastic/elastic.go b/pkg/tracing/elastic/elastic.go
index e1df66b20..9f3580dca 100644
--- a/pkg/tracing/elastic/elastic.go
+++ b/pkg/tracing/elastic/elastic.go
@@ -15,6 +15,13 @@ import (
 // Name sets the name of this tracer.
 const Name = "elastic"
 
+func init() {
+	// The APM lib uses the init() function to create a default tracer.
+	// So this default tracer must be disabled.
+	// https://github.com/elastic/apm-agent-go/blob/8dd383d0d21776faad8841fe110f35633d199a03/tracer.go#L61-L65
+	apm.DefaultTracer.Close()
+}
+
 // Config provides configuration settings for a elastic.co tracer.
 type Config struct {
 	ServerURL          string `description:"Set the URL of the Elastic APM server." json:"serverURL,omitempty" toml:"serverURL,omitempty" yaml:"serverURL,omitempty"`