diff --git a/.travis.yml b/.travis.yml
index 8811db40d..3115ab6ae 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: php
 php:
-  - '5.6'
-  - '7.0'
+  - 7.2
+  - 7.3
 services:
   - mysql
 before_script:
diff --git a/composer.json b/composer.json
old mode 100644
new mode 100755
index b0d98efd0..13d1bd5fa
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "license": "GPLv2+",
     "type": "project",
     "require": {
-        "php": ">=5.5.9",
+        "php": ">=5.5.9 <7.4",
         "laravel/lumen-framework": "5.1.*",
         "vlucas/phpdotenv": "~1.0",
         "illuminate/mail": "~5.1",
@@ -14,7 +14,7 @@
         "torann/geoip": "^1.0",
         "geoip2/geoip2": "^2.4",
         "nesbot/carbon": "^1.22",
-        "doctrine/dbal": "^2.5",
+        "doctrine/dbal": "<2.10",
         "google/recaptcha": "~1.1",
         "symfony/http-foundation": "2.7.51"
     },
diff --git a/composer.lock b/composer.lock
old mode 100644
new mode 100755
index 636374e68..878e76790
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "09b953d160500e6dfbcaa6c916371495",
+    "content-hash": "f4eab7ae8aca9ec102d2f33902a32b84",
     "packages": [
         {
             "name": "composer/ca-bundle",
@@ -230,33 +230,31 @@
         },
         {
             "name": "doctrine/dbal",
-            "version": "2.11.1",
+            "version": "v2.9.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/dbal.git",
-                "reference": "6e6903cd5e3a5be60a79439e3ee8fe126f78fe86"
+                "reference": "7345cd59edfa2036eb0fa4264b77ae2576842035"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/dbal/zipball/6e6903cd5e3a5be60a79439e3ee8fe126f78fe86",
-                "reference": "6e6903cd5e3a5be60a79439e3ee8fe126f78fe86",
+                "url": "https://api.github.com/repos/doctrine/dbal/zipball/7345cd59edfa2036eb0fa4264b77ae2576842035",
+                "reference": "7345cd59edfa2036eb0fa4264b77ae2576842035",
                 "shasum": ""
             },
             "require": {
                 "doctrine/cache": "^1.0",
                 "doctrine/event-manager": "^1.0",
                 "ext-pdo": "*",
-                "php": "^7.3"
+                "php": "^7.1"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^8.1",
-                "jetbrains/phpstorm-stubs": "^2019.1",
-                "nikic/php-parser": "^4.4",
-                "phpstan/phpstan": "^0.12.40",
-                "phpunit/phpunit": "^9.3",
-                "psalm/plugin-phpunit": "^0.10.0",
-                "symfony/console": "^2.0.5|^3.0|^4.0|^5.0",
-                "vimeo/psalm": "^3.14.2"
+                "doctrine/coding-standard": "^5.0",
+                "jetbrains/phpstorm-stubs": "^2018.1.2",
+                "phpstan/phpstan": "^0.10.1",
+                "phpunit/phpunit": "^7.4",
+                "symfony/console": "^2.0.5|^3.0|^4.0",
+                "symfony/phpunit-bridge": "^3.4.5|^4.0.5"
             },
             "suggest": {
                 "symfony/console": "For helpful console commands such as SQL execution and import of files."
@@ -267,7 +265,8 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0.x-dev"
+                    "dev-master": "2.9.x-dev",
+                    "dev-develop": "3.0.x-dev"
                 }
             },
             "autoload": {
@@ -302,39 +301,14 @@
             "keywords": [
                 "abstraction",
                 "database",
-                "db2",
                 "dbal",
-                "mariadb",
-                "mssql",
                 "mysql",
-                "oci8",
-                "oracle",
-                "pdo",
+                "persistence",
                 "pgsql",
-                "postgresql",
-                "queryobject",
-                "sasql",
-                "sql",
-                "sqlanywhere",
-                "sqlite",
-                "sqlserver",
-                "sqlsrv"
-            ],
-            "funding": [
-                {
-                    "url": "https://www.doctrine-project.org/sponsorship.html",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://www.patreon.com/phpdoctrine",
-                    "type": "patreon"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/doctrine%2Fdbal",
-                    "type": "tidelift"
-                }
+                "php",
+                "queryobject"
             ],
-            "time": "2020-09-27T04:09:41+00:00"
+            "time": "2019-11-02T22:19:34+00:00"
         },
         {
             "name": "doctrine/event-manager",
@@ -5498,7 +5472,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.5.9"
+        "php": ">=5.5.9 <7.4"
     },
     "platform-dev": [],
     "plugin-api-version": "1.1.0"
diff --git a/docs/user-guide/installation.md b/docs/user-guide/installation.md
index 96feef938..7d66d3c05 100644
--- a/docs/user-guide/installation.md
+++ b/docs/user-guide/installation.md
@@ -11,7 +11,7 @@ you may be interested in looking at a [legacy 1.x release](https://github.com/cy
 
 
  - Apache, nginx, IIS, or lighttpd (Apache preferred)
- - PHP >= 5.5.9
+ - PHP >= 7.2 and < 7.4
  - MariaDB or MySQL >= 5.5, SQLite alternatively
  - composer
  - PHP requirements: