diff --git a/.circleci/config.yml b/.circleci/config.yml
index 301ded93..1e59b5de 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -41,7 +41,7 @@ jobs:
       - attach_workspace:
           at: /          
       - checkout
-      - run: apt-get update; apt-get install -y --no-install-recommends autoconf automake libtool git cmake make g++ xz-utils libgtk-3-dev libasound2-dev libpulse-dev
+      - run: apt-get update; apt-get install -y --no-install-recommends autoconf automake libtool git cmake make g++ xz-utils libgtk-3-dev libxtst-dev libasound2-dev libpulse-dev
       - run: echo 'export PATH=/depot_tools:$PATH' >> $BASH_ENV
       - run: cd ${WEBRTCROOT} && gclient sync 
       
diff --git a/Dockerfile b/Dockerfile
index 43b9d377..aa6e453b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ LABEL maintainer=michel.promonet@free.fr
 WORKDIR /webrtc-streamer
 COPY . /webrtc-streamer
 
-RUN apt-get update && apt-get install -y --no-install-recommends g++ autoconf automake libtool xz-utils libpulse-dev libasound2-dev libgtk-3-dev cmake p7zip-full \
+RUN apt-get update && apt-get install -y --no-install-recommends g++ autoconf automake libtool xz-utils libpulse-dev libasound2-dev libgtk-3-dev libxtst-dev cmake p7zip-full \
         && git clone --depth 1 https://chromium.googlesource.com/chromium/tools/depot_tools.git /webrtc/depot_tools \
         && export PATH=/webrtc/depot_tools:$PATH \
 	&& cd /webrtc \
@@ -25,7 +25,7 @@ FROM ubuntu:18.04
 WORKDIR /app
 COPY --from=builder /app/ /app/
 
-RUN apt-get update && apt-get install -y --no-install-recommends libasound2 libgtk-3-0 libssl1.0 \
+RUN apt-get update && apt-get install -y --no-install-recommends libasound2 libgtk-3-0 libxtst6 libssl1.0 \
 	&& apt-get clean && rm -rf /var/lib/apt/lists/ \
 	&& ./webrtc-streamer -V
 
diff --git a/README.md b/README.md
index 65ee6c44..30d83033 100755
--- a/README.md
+++ b/README.md
@@ -137,7 +137,7 @@ The command `curl -s ifconfig.me` is getting the public IP, it could also given
 
 In order to configure the NAT rules using the upnp feature of the router, it is possible to use [upnpc](https://manpages.debian.org/unstable/miniupnpc/upnpc.1.en.html) like this:
 
-    upnpc -r 8000 tcp 3478 udp
+    upnpc -r 8000 tcp 3478 tcp 3478 udp
 Adapting with the HTTP port, STUN port, TURN port.
 
 Embed in a HTML page: