diff --git a/dockerfile/Dockerfile b/dockerfile/Dockerfile
index 39b2599..b00a90a 100644
--- a/dockerfile/Dockerfile
+++ b/dockerfile/Dockerfile
@@ -4,7 +4,7 @@ ENV GIN_MODE release
 RUN apk add --update git bash && rm -rf /var/cache/apk/*
 RUN go get -d github.com/channelmeter/vault-gatekeeper-mesos && \
 	cd $GOPATH/src/github.com/channelmeter/vault-gatekeeper-mesos && \
-	git checkout tags/0.0.5
+	git checkout tags/0.0.6
 RUN cd $GOPATH/src/github.com/channelmeter/vault-gatekeeper-mesos && \
 	/bin/bash ./build.bash && cp ./vltgatekeeper /bin/vltgatekeeper
 
diff --git a/gatekeeper.go b/gatekeeper.go
index 4dd2006..f9736dd 100644
--- a/gatekeeper.go
+++ b/gatekeeper.go
@@ -71,7 +71,7 @@ func defaultEnvVar(key string, def string) (val string) {
 func init() {
 	flag.StringVar(&config.ListenAddress, "listen", defaultEnvVar("LISTEN_ADDR", ":9201"), "Hostname and port to listen on. (Overrides the LISTEN_ADDR environment variable if set.)")
 	flag.StringVar(&config.TlsCert, "tls-cert", defaultEnvVar("TLS_CERT", ""), "Path to TLS certificate. If this value is set, gatekeeper will be served over TLS.")
-	flag.StringVar(&config.TlsKey, "tls-cert", defaultEnvVar("TLS_KEY", ""), "Path to TLS key. If this value is set, gatekeeper will be served over TLS.")
+	flag.StringVar(&config.TlsKey, "tls-key", defaultEnvVar("TLS_KEY", ""), "Path to TLS key. If this value is set, gatekeeper will be served over TLS.")
 
 	flag.StringVar(&config.Mesos, "mesos", defaultEnvVar("MESOS_MASTER", ""), "Address to mesos master. (Overrides the MESOS_MASTER environment variable if set.)")