diff --git a/.gitignore b/.gitignore
index 2a7fb730..e3bcd671 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ vendor/
 .env
 data/database.sqlite
 docs/swagger-ui
+docker-compose.override.yml
diff --git a/composer.json b/composer.json
index faab4cb7..226419e7 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "^5.6 || ^7.0",
+        "php": "^7.0",
         "roave/security-advisories": "dev-master",
         "zendframework/zend-expressive": "^2.0",
         "zendframework/zend-expressive-fastroute": "^2.0",
@@ -39,11 +39,12 @@
         "theorchard/monolog-cascade": "^0.4",
         "endroid/qrcode": "^1.7",
         "mikehaertl/phpwkhtmltopdf": "^2.2",
-        "doctrine/migrations": "^1.4"
+        "doctrine/migrations": "^1.4",
+        "http-interop/http-middleware": "^0.4.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7 || ^6.0",
-        "squizlabs/php_codesniffer": "^2.3",
+        "squizlabs/php_codesniffer": "^3.1",
         "filp/whoops": "^2.0",
         "symfony/var-dumper": "^3.0",
         "vlucas/phpdotenv": "^2.2",
diff --git a/data/infra/php.Dockerfile b/data/infra/php.Dockerfile
index 28d9d6f3..fac0b498 100644
--- a/data/infra/php.Dockerfile
+++ b/data/infra/php.Dockerfile
@@ -26,7 +26,7 @@ RUN apk add --no-cache --virtual libpng-dev
 RUN docker-php-ext-install gd
 
 # Install redis extension
-ADD https://github.com/phpredis/phpredis/archive/php7.tar.gz /tmp/phpredis.tar.gz
+ADD https://github.com/phpredis/phpredis/archive/3.1.4.tar.gz /tmp/phpredis.tar.gz
 RUN mkdir -p /usr/src/php/ext/redis\
   && tar xf /tmp/phpredis.tar.gz -C /usr/src/php/ext/redis --strip-components=1
 # configure and install
@@ -85,3 +85,6 @@ RUN rm /tmp/xdebug.tar.gz
 RUN php -r "readfile('https://getcomposer.org/installer');" | php
 RUN chmod +x composer.phar
 RUN mv composer.phar /usr/local/bin/composer
+
+# Make home directory writable by anyone
+RUN chmod 777 /home
diff --git a/docker-compose.override.yml.dist b/docker-compose.override.yml.dist
new file mode 100644
index 00000000..b347b9e8
--- /dev/null
+++ b/docker-compose.override.yml.dist
@@ -0,0 +1,8 @@
+version: '2'
+
+services:
+    shlink_php:
+        user: 1000:1000
+        volumes:
+            - /etc/passwd:/etc/passwd:ro
+            - /etc/group:/etc/group:ro