diff --git a/Dockerfile b/Dockerfile
index 7718492..7f27ffa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,25 @@
-FROM ndiazg/nginx-prometheus-exporter as mtail
+FROM alpine:3.8 as mtail
+
+ENV GOPATH     /go
+ENV PATH       /go/bin:$PATH
+
+RUN apk add --no-cache --update musl musl-dev go git bash make
+
+RUN mkdir -p  /go/src/github.com/google/ && \
+    git clone https://github.com/google/mtail.git /go/src/github.com/google/mtail && \
+    cd /go/src/github.com/google/mtail && \
+    git checkout v3.0.0-rc17 && \
+    make install_deps && make install
+
+RUN ls -la /go/bin
 
 FROM fish/nginx-exporter:v0.1.0 as status
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 RUN apk add --no-cache supervisor
 
-COPY --from=mtail /usr/local/bin/mtail /usr/local/bin/mtail
+COPY --from=mtail /go/bin/mtail /usr/local/bin/mtail
 COPY --from=status /usr/local/bin/nginx_exporter /usr/local/bin/nginx_exporter
 COPY assets/merger.yaml /etc/exporter-merger.yaml
 COPY assets/supervisord.conf /etc/supervisord.conf
diff --git a/README.md b/README.md
index 5df373d..d506eac 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ A meta nginx exporter that combines two different exporters
 ## References
 
 * The mtail programm is based on
-  [ndiazg/nginx-prometheus-exporter](https://github.com/ndiazg/nginx-prometheus-exporter).
+  [google/mtail](https://github.com/google/mtail).
 * The status page exporter is from
   [discordianfish/nginx_exporter](https://github.com/discordianfish/nginx_exporter).
 * The exporter merger is from
@@ -92,7 +92,7 @@ The exporter provides three metric endpoints:
 
 - `3093` -- mtail exporter
 - `9113` -- status page exporter
-- `9397` -- merged mertrics from mtail and status page exporter
+- `9397` -- merged metrics from mtail and status page exporter
 
 ### Kubernetes
 
diff --git a/assets/nginx.mtail b/assets/nginx.mtail
index 492d137..b0ac633 100644
--- a/assets/nginx.mtail
+++ b/assets/nginx.mtail
@@ -29,8 +29,8 @@ counter nginx_request_duration_milliseconds_count by vhost, method, code
 
   nginx_response_size_bytes_sum[$vhost][tolower($request_method)][$status][tolower($upstream_cache_status)] += $bytes_sent
 
-  nginx_request_duration_milliseconds_count[$vhost][tolower($request_method)][$status][tolower($upstream_cache_status)]++
-  nginx_request_duration_milliseconds_sum[$vhost][tolower($request_method)][$status] += $request_seconds * 1000 + $request_milliseconds < 100
+  nginx_request_duration_milliseconds_count[$vhost][tolower($request_method)][$status]++
+  nginx_request_duration_milliseconds_sum[$vhost][tolower($request_method)][$status] += $request_seconds * 1000 + $request_milliseconds
 
   $request_seconds * 1000 + $request_milliseconds < 100 {
     nginx_request_duration_milliseconds_bucket["100"][$vhost][tolower($request_method)][$status]++
@@ -87,7 +87,4 @@ counter nginx_request_duration_milliseconds_count by vhost, method, code
   }
 
   nginx_request_duration_milliseconds_bucket["+Inf"][$vhost][tolower($request_method)][$status]++
-
-  nginx_request_duration_milliseconds_sum["+Inf"][$vhost][tolower($request_method)][$status] += $request_seconds * 1000 + $request_milliseconds
-
 }