diff --git a/README.md b/README.md
index b932a30..dc7a75e 100644
--- a/README.md
+++ b/README.md
@@ -41,4 +41,20 @@ PasswordAuthentication no
 ChallengeResponseAuthentication no
 UsePAM no
 ```
-* `sudo systemctl restart ssh`
\ No newline at end of file
+* `sudo systemctl restart ssh`
+
+## Set locale
+* https://www.mvoronin.pro/ru/blog/post-40
+* https://stackoverflow.com/questions/55673886/what-is-the-difference-between-c-utf-8-and-en-us-utf-8-locales
+* locale-gen en_US.UTF-8
+* edit `/etc/default/locale`
+* Put minimal config
+```
+LANG=C.UTF-8
+LANGUAGE=en_US
+LC_ALL=C.UTF-8
+```
+
+## Production docker version
+docker -v
+Docker version 19.03.5, build 633a0ea838
\ No newline at end of file
diff --git a/install-docker.sh b/install-docker.sh
index c7df45e..5f643f6 100755
--- a/install-docker.sh
+++ b/install-docker.sh
@@ -21,7 +21,11 @@ sudo add-apt-repository \
 
 sudo apt-get update
 
-sudo apt-get install -y docker-ce=18.06.3~ce~3-0~ubuntu
+# Old production version
+#sudo apt-get install -y docker-ce=18.06.3~ce~3-0~ubuntu
+
+# New production version
+sudo apt-get install docker-ce=5:19.03.5~3-0~ubuntu-bionic docker-ce-cli=5:19.03.5~3-0~ubuntu-bionic containerd.io
 
 sudo curl -L https://github.com/docker/compose/releases/download/1.22.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose