diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5e851a8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/apps/
+!/apps/.gitkeep
diff --git a/Dockerfile b/Dockerfile
index e2869ce..837dbf0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM elixir:1.9.4
+FROM elixir:1.11.3
 
 ENV APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=DontWarn
 ENV DEBIAN_FRONTEND noninteractive
@@ -8,9 +8,16 @@ RUN apt-get update
 RUN apt-get -y upgrade
 RUN apt-get -y install git vim sudo inotify-tools
 
-RUN curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
-
+RUN curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -
 RUN apt-get -y install nodejs
+RUN npm install -g npm
+
+RUN sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+RUN sudo wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
+RUN apt-get update
+RUN apt-get -y install postgresql-client-12 default-mysql-client
+
+RUN apt-get update && apt-get -y upgrade
 
 ARG UID=1000
 ARG GID=1000
@@ -27,4 +34,4 @@ WORKDIR /apps
 
 RUN mix local.hex --force
 RUN mix local.rebar --force
-RUN mix archive.install --force hex phx_new 1.4.11
+RUN mix archive.install --force hex phx_new 1.5.7
diff --git a/README.md b/README.md
index 6cf8de0..3786e1f 100644
--- a/README.md
+++ b/README.md
@@ -5,19 +5,21 @@ Docker を用いて Elixir/Phoenix アプリケーションの開発・学習を
 ## 構築される環境
 
 * Debian 10 (Buster)
-* Erlang/OTP 22.1.8
-* Elixir 1.9.4
-* Phoenix 1.4.11
-* Node.js 10.18
-* npm 6.13
+* Erlang/OTP 23
+* Elixir 1.11.3
+* Phoenix 1.5.7
+* Node.js 14.15.4
+* npm 7.5.4
 
 ## 必要なソフトウェア
 
-* Docker 18 以上
+* Docker 20 以上
+* Docker Compose 1.27 以上
 * Git 2.7 以上
 
 ## 動作確認済みのOS
 
-* macOS 10.14 Mojave
-* Ubuntu 16.04
-* Ubuntu 18.04
+* macOS Big Sur v11
+* macOS Catalina v10.15
+* Ubuntu 20.04
+
diff --git a/docker-compose.yml b/docker-compose.yml
index b5715e1..57942d6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,26 @@
-version: "3"
+version: "3.1"
 services:
+  postgres:
+    image: postgres:12.5-alpine
+    environment:
+      POSTGRES_USER: phoenix
+      POSTGRES_DB: nano_planner_dev
+      POSTGRES_PASSWORD: phoenix
+      POSTGRES_INITDB_ARGS: "--encoding=UTF-8 --locale=ja_JP.UTF-8"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+
+  mysql:
+    image: mysql:8.0.22
+    command: --default-authentication-plugin=mysql_native_password
+    environment:
+      MYSQL_ROOT_PASSWORD: example
+      MYSQL_USER: phoenix
+      MYSQL_PASSWORD: phoenix
+      MYSQL_DATABASE: nano_planner_dev
+    volumes:
+      - mysql_data:/var/lib/mysql
+
   web:
     build: .
     command: bash
@@ -11,4 +32,11 @@ services:
     working_dir: /apps
     ports:
       - "4000:4000"
+    depends_on:
+      - postgres
+      - mysql
     tty: true
+
+volumes:
+  postgres_data:
+  mysql_data: