diff --git a/docker/linux/amd64/Dockerfile b/docker/linux/amd64/Dockerfile
index 47586560..e974566e 100644
--- a/docker/linux/amd64/Dockerfile
+++ b/docker/linux/amd64/Dockerfile
@@ -3,7 +3,7 @@ FROM golang:1.12
 
 # download the source
 WORKDIR /go/src/github.com/nats-io/prometheus-nats-exporter
-RUN git clone --branch v0.3.0 https://github.com/nats-io/prometheus-nats-exporter.git .
+RUN git clone --branch v0.4.0 https://github.com/nats-io/prometheus-nats-exporter.git .
 
 # build
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -v -a -tags netgo -installsuffix netgo -ldflags "-s -w"
diff --git a/docker/linux/arm32v7/Dockerfile b/docker/linux/arm32v7/Dockerfile
index 33e9a171..6fa244ae 100644
--- a/docker/linux/arm32v7/Dockerfile
+++ b/docker/linux/arm32v7/Dockerfile
@@ -3,7 +3,7 @@ FROM golang:1.12
 
 # download the source
 WORKDIR /go/src/github.com/nats-io/prometheus-nats-exporter
-RUN git clone --branch v0.3.0 https://github.com/nats-io/prometheus-nats-exporter.git .
+RUN git clone --branch v0.4.0 https://github.com/nats-io/prometheus-nats-exporter.git .
 
 # build 
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build -v -a -tags netgo -installsuffix netgo -ldflags "-s -w"
diff --git a/docker/linux/arm64v8/Dockerfile b/docker/linux/arm64v8/Dockerfile
index 0d8e7378..dc60107c 100644
--- a/docker/linux/arm64v8/Dockerfile
+++ b/docker/linux/arm64v8/Dockerfile
@@ -3,7 +3,7 @@ FROM golang:1.12
 
 # download the source
 WORKDIR /go/src/github.com/nats-io/prometheus-nats-exporter
-RUN git clone --branch v0.3.0 https://github.com/nats-io/prometheus-nats-exporter.git .
+RUN git clone --branch v0.4.0 https://github.com/nats-io/prometheus-nats-exporter.git .
 
 # build 
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -v -a -tags netgo -installsuffix netgo -ldflags "-s -w"
diff --git a/docker/windows/amd64/nanoserver/Dockerfile b/docker/windows/amd64/nanoserver/Dockerfile
index 6a4cac68..56963908 100644
--- a/docker/windows/amd64/nanoserver/Dockerfile
+++ b/docker/windows/amd64/nanoserver/Dockerfile
@@ -3,7 +3,7 @@ FROM golang:1.12
 
 # download the source
 WORKDIR /go/src/github.com/nats-io/prometheus-nats-exporter
-RUN git clone --branch v0.3.0 https://github.com/nats-io/prometheus-nats-exporter.git .
+RUN git clone --branch v0.4.0 https://github.com/nats-io/prometheus-nats-exporter.git .
 
 # build 
 RUN go build -v -a -tags netgo -installsuffix netgo
diff --git a/docker/windows/amd64/windowsservercore/Dockerfile b/docker/windows/amd64/windowsservercore/Dockerfile
index 755b6a70..7b50b615 100644
--- a/docker/windows/amd64/windowsservercore/Dockerfile
+++ b/docker/windows/amd64/windowsservercore/Dockerfile
@@ -3,7 +3,7 @@ FROM golang:1.12
 
 # download the source
 WORKDIR /go/src/github.com/nats-io/prometheus-nats-exporter
-RUN git clone --branch v0.3.0 https://github.com/nats-io/prometheus-nats-exporter.git .
+RUN git clone --branch v0.4.0 https://github.com/nats-io/prometheus-nats-exporter.git .
 
 # build 
 RUN go build -v -a -tags netgo -installsuffix netgo
diff --git a/prometheus_nats_exporter.go b/prometheus_nats_exporter.go
index 987543fb..0d72d80e 100644
--- a/prometheus_nats_exporter.go
+++ b/prometheus_nats_exporter.go
@@ -27,7 +27,7 @@ import (
 	"github.com/nats-io/prometheus-nats-exporter/exporter"
 )
 
-var version = "dev"
+var version = "0.4.0"
 
 // parseServerIDAndURL parses the url argument the optional id for the server ID.
 func parseServerIDAndURL(urlArg string) (string, string, error) {