diff --git a/Dockerfile b/Dockerfile
index 18529df..c93799d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # FIREFOX WITH ANONIMOUS USER
-# VERSION 86.0.1
-FROM debian:buster-slim
+# VERSION 113.0.2
+FROM debian:bullseye-slim
 MAINTAINER Luis GL <luisgulo@gmail.com>
 # Todo actualizado
 RUN apt -y update; apt -y upgrade
@@ -14,7 +14,7 @@ ENV LC_ALL es_ES.UTF-8
 # Repositorio SoloConLinux
 RUN wget https://repositorio.soloconlinux.org.es/soloconlinux.list -O /etc/apt/sources.list.d/soloconlinux.list
 # Clave GPG SoloConLinux
-RUN wget -qO - https://repositorio.soloconlinux.org.es/repo-gpg.key | apt-key add -
+RUN wget -qO - https://repositorio.soloconlinux.org.es/repo-gpg.key -O /usr/share/keyrings/repositorio-archive-keyring.gpg
 RUN apt -y update; apt -y install firefox; apt-get clean
 RUN GID=1000; UID=1000; UNAME=anonimo; mkdir -p /home/$UNAME; echo "$UNAME:x:${UID}:${GID}:Developer,,,:/home/$UNAME:/bin/bash" >> /etc/passwd; echo "$UNAME:x:${UID}:" >> /etc/group; chown ${UID}:${GID} -R /home/$UNAME
 USER anonimo
diff --git a/README.md b/README.md
index bd12ff7..5d642c8 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,26 @@
 # firefox-docker
 
+
+**BUILD IMAGE**
+
+docker build --tag firefox:$(grep 'VERSION' Dockerfile |awk '{print $3}') .
+
+Re-Tag image:
+
+docker tag firefox:$(grep 'VERSION' Dockerfile |awk '{print $3}') firefox:latest
+
 **LAUNCH FIREFOX**
 
 To launch Firefox from the container run the command:
 ~~~
-docker run -ti --rm  -e DISPLAY=$DISPLAY.0 -v /tmp/.X11-unix:/tmp/.X11-unix luisgutierrez/firefox:86.0.1
+
+RUN from local image (your build):
+
+docker run -ti --rm  -e DISPLAY=$DISPLAY.0 -v /tmp/.X11-unix:/tmp/.X11-unix firefox:latest
+
+RUN from my image (my build):
+
+docker run -ti --rm  -e DISPLAY=$DISPLAY.0 -v /tmp/.X11-unix:/tmp/.X11-unix luisgutierrez/firefox:latest
 ~~~
 
 It is not necessary to invoke Firefox, it is launched automatically when executing the container