diff --git a/.gitignore b/.gitignore
index b95facf..612ef61 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 /.buildpath
 /.project
 /.settings/
+/.idea/
 
 /test.php
 /version.txt
diff --git a/.travis.yml b/.travis.yml
index ef5e21e..23b7c1d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,10 +15,10 @@ env:
 
 matrix:
   include:
+    - php: 7.4
     - php: 7.3
-    - php: 7.2
       env: DEPLOY=true
-    - php: 7.1
+    - php: 7.2
 
 deploy:
   - provider: releases
diff --git a/Dockerfile b/Dockerfile
index 92d2ae0..549e242 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,7 @@
-FROM php:7.2-alpine
+FROM php:7.3-alpine
 
 ENTRYPOINT ["/usr/local/bin/myformer"]
 
+WORKDIR /dumps
+
 COPY myformer.phar /usr/local/bin/myformer
diff --git a/README.md b/README.md
index d339823..ae3bea1 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
-[![Build Status](https://travis-ci.org/NINEJKH/myformer.svg?branch=master)](https://travis-ci.org/NINEJKH/myformer)
-
 # myformer
 
+[![Build Status](https://travis-ci.com/NINEJKH/myformer.svg?branch=master)](https://travis-ci.com/NINEJKH/myformer)
+
 ## Installation
 
 ```bash
@@ -39,24 +39,19 @@ $ mysqldump \
 ### create config
 
 ```bash
-$ cat <<'EOF' > .myform.json
+$ cat <<'EOF' > ./myform.json
 {
-    "table_name": [{
-            "columnA": {
-                "Tel": null
-            } 
-        },
-        {
-            "columnB": {
-                "Email": "qa+%s@company.com"
-            }
-        },
-        {
-            "columnC": {
-                "Set": "static content"
-            }
-        }
-    ]
+  "table_name": {
+    "columnA": {
+      "Tel": null
+    },
+    "columnB": {
+      "Email": "qa+%s@company.com"
+    },
+    "columnC": {
+      "Set": "static content"
+    }
+  }
 }
 EOF
 ```
@@ -64,7 +59,13 @@ EOF
 ### anonymise data
 
 ```bash
-$ myformer transform *_data.sql
+myformer transform foobar_data.sql
+```
+
+or via docker:
+
+```bash
+docker run -it --rm -v "${PWD}:/dumps" 9jkh/myformer transform foobar_data.sql
 ```
 
 This will create a file with the same name + postfixed with "+transformed".
diff --git a/composer.json b/composer.json
index 7765bd8..2804394 100644
--- a/composer.json
+++ b/composer.json
@@ -9,8 +9,13 @@
             "email": "hello@9jkh.co.za"
         }
     ],
+    "config": {
+        "platform": {
+            "php": "7.3.16"
+        }
+    },
     "require": {
-        "php": ">=7.1.0",
+        "php": ">=7.3.0",
         "symfony/console": "^4.0"
     },
     "autoload": {
diff --git a/composer.lock b/composer.lock
index c7be71f..1da8fc3 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,40 +1,97 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "9bee3f14934bbb1e756ee31a0aa4639c",
+    "content-hash": "b1f508bc5041e2d036b2dfcf014f83dd",
     "packages": [
+        {
+            "name": "psr/container",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/container.git",
+                "reference": "b7ce3b176482dbbc1245ebf52b181af44c2cf55f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/container/zipball/b7ce3b176482dbbc1245ebf52b181af44c2cf55f",
+                "reference": "b7ce3b176482dbbc1245ebf52b181af44c2cf55f",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Container\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common Container Interface (PHP FIG PSR-11)",
+            "homepage": "https://github.com/php-fig/container",
+            "keywords": [
+                "PSR-11",
+                "container",
+                "container-interface",
+                "container-interop",
+                "psr"
+            ],
+            "time": "2017-02-14T16:28:37+00:00"
+        },
         {
             "name": "symfony/console",
-            "version": "v4.0.3",
+            "version": "v4.4.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "fe0e69d7162cba0885791cf7eea5f0d7bc0f897e"
+                "reference": "4fa15ae7be74e53f6ec8c83ed403b97e23b665e9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/fe0e69d7162cba0885791cf7eea5f0d7bc0f897e",
-                "reference": "fe0e69d7162cba0885791cf7eea5f0d7bc0f897e",
+                "url": "https://api.github.com/repos/symfony/console/zipball/4fa15ae7be74e53f6ec8c83ed403b97e23b665e9",
+                "reference": "4fa15ae7be74e53f6ec8c83ed403b97e23b665e9",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1.3",
-                "symfony/polyfill-mbstring": "~1.0"
+                "symfony/polyfill-mbstring": "~1.0",
+                "symfony/polyfill-php73": "^1.8",
+                "symfony/service-contracts": "^1.1|^2"
             },
             "conflict": {
                 "symfony/dependency-injection": "<3.4",
+                "symfony/event-dispatcher": "<4.3|>=5",
+                "symfony/lock": "<4.4",
                 "symfony/process": "<3.3"
             },
+            "provide": {
+                "psr/log-implementation": "1.0"
+            },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~3.4|~4.0",
-                "symfony/dependency-injection": "~3.4|~4.0",
-                "symfony/event-dispatcher": "~3.4|~4.0",
-                "symfony/lock": "~3.4|~4.0",
-                "symfony/process": "~3.4|~4.0"
+                "symfony/config": "^3.4|^4.0|^5.0",
+                "symfony/dependency-injection": "^3.4|^4.0|^5.0",
+                "symfony/event-dispatcher": "^4.3",
+                "symfony/lock": "^4.4|^5.0",
+                "symfony/process": "^3.4|^4.0|^5.0",
+                "symfony/var-dumper": "^4.3|^5.0"
             },
             "suggest": {
                 "psr/log": "For using the console logger",
@@ -45,7 +102,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.4-dev"
                 }
             },
             "autoload": {
@@ -72,20 +129,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2020-02-24T13:10:00+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.6.0",
+            "version": "v1.14.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296"
+                "reference": "34094cfa9abe1f0f14f48f490772db7a775559f2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296",
-                "reference": "2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/34094cfa9abe1f0f14f48f490772db7a775559f2",
+                "reference": "34094cfa9abe1f0f14f48f490772db7a775559f2",
                 "shasum": ""
             },
             "require": {
@@ -97,7 +154,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.6-dev"
+                    "dev-master": "1.14-dev"
                 }
             },
             "autoload": {
@@ -131,33 +188,151 @@
                 "portable",
                 "shim"
             ],
-            "time": "2017-10-11T12:05:26+00:00"
+            "time": "2020-01-13T11:15:53+00:00"
+        },
+        {
+            "name": "symfony/polyfill-php73",
+            "version": "v1.14.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php73.git",
+                "reference": "5e66a0fa1070bf46bec4bea7962d285108edd675"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php73/zipball/5e66a0fa1070bf46bec4bea7962d285108edd675",
+                "reference": "5e66a0fa1070bf46bec4bea7962d285108edd675",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.14-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php73\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ],
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 7.3+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2020-01-13T11:15:53+00:00"
+        },
+        {
+            "name": "symfony/service-contracts",
+            "version": "v2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/service-contracts.git",
+                "reference": "144c5e51266b281231e947b51223ba14acf1a749"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/144c5e51266b281231e947b51223ba14acf1a749",
+                "reference": "144c5e51266b281231e947b51223ba14acf1a749",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2.5",
+                "psr/container": "^1.0"
+            },
+            "suggest": {
+                "symfony/service-implementation": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Contracts\\Service\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Generic abstractions related to writing services",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "abstractions",
+                "contracts",
+                "decoupling",
+                "interfaces",
+                "interoperability",
+                "standards"
+            ],
+            "time": "2019-11-18T17:27:11+00:00"
         }
     ],
     "packages-dev": [
         {
             "name": "doctrine/instantiator",
-            "version": "1.1.0",
+            "version": "1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda"
+                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/ae466f726242e637cebdd526a7d991b9433bacf1",
+                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1"
             },
             "require-dev": {
-                "athletic/athletic": "~0.1.8",
+                "doctrine/coding-standard": "^6.0",
                 "ext-pdo": "*",
                 "ext-phar": "*",
-                "phpunit/phpunit": "^6.2.3",
-                "squizlabs/php_codesniffer": "^3.0.2"
+                "phpbench/phpbench": "^0.13",
+                "phpstan/phpstan-phpunit": "^0.11",
+                "phpstan/phpstan-shim": "^0.11",
+                "phpunit/phpunit": "^7.0"
             },
             "type": "library",
             "extra": {
@@ -182,34 +357,37 @@
                 }
             ],
             "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
-            "homepage": "https://github.com/doctrine/instantiator",
+            "homepage": "https://www.doctrine-project.org/projects/instantiator.html",
             "keywords": [
                 "constructor",
                 "instantiate"
             ],
-            "time": "2017-07-22T11:58:36+00:00"
+            "time": "2019-10-21T16:45:58+00:00"
         },
         {
             "name": "myclabs/deep-copy",
-            "version": "1.7.0",
+            "version": "1.9.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e"
+                "reference": "b2c28789e80a97badd14145fda39b545d83ca3ef"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
-                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/b2c28789e80a97badd14145fda39b545d83ca3ef",
+                "reference": "b2c28789e80a97badd14145fda39b545d83ca3ef",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.6 || ^7.0"
+                "php": "^7.1"
+            },
+            "replace": {
+                "myclabs/deep-copy": "self.version"
             },
             "require-dev": {
                 "doctrine/collections": "^1.0",
                 "doctrine/common": "^2.6",
-                "phpunit/phpunit": "^4.1"
+                "phpunit/phpunit": "^7.1"
             },
             "type": "library",
             "autoload": {
@@ -232,7 +410,7 @@
                 "object",
                 "object graph"
             ],
-            "time": "2017-10-19T19:58:43+00:00"
+            "time": "2020-01-17T21:11:47+00:00"
         },
         {
             "name": "phar-io/manifest",
@@ -338,35 +516,33 @@
         },
         {
             "name": "phpdocumentor/reflection-common",
-            "version": "1.0.1",
+            "version": "2.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
-                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6"
+                "reference": "63a995caa1ca9e5590304cd845c15ad6d482a62a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
-                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/63a995caa1ca9e5590304cd845c15ad6d482a62a",
+                "reference": "63a995caa1ca9e5590304cd845c15ad6d482a62a",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5"
+                "php": ">=7.1"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.6"
+                "phpunit/phpunit": "~6"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "2.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "phpDocumentor\\Reflection\\": [
-                        "src"
-                    ]
+                    "phpDocumentor\\Reflection\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -388,44 +564,42 @@
                 "reflection",
                 "static analysis"
             ],
-            "time": "2017-09-11T18:02:19+00:00"
+            "time": "2018-08-07T13:53:10+00:00"
         },
         {
             "name": "phpdocumentor/reflection-docblock",
-            "version": "4.2.0",
+            "version": "5.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
-                "reference": "66465776cfc249844bde6d117abff1d22e06c2da"
+                "reference": "cd72d394ca794d3466a3b2fc09d5a6c1dc86b47e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/66465776cfc249844bde6d117abff1d22e06c2da",
-                "reference": "66465776cfc249844bde6d117abff1d22e06c2da",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/cd72d394ca794d3466a3b2fc09d5a6c1dc86b47e",
+                "reference": "cd72d394ca794d3466a3b2fc09d5a6c1dc86b47e",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.0",
-                "phpdocumentor/reflection-common": "^1.0.0",
-                "phpdocumentor/type-resolver": "^0.4.0",
-                "webmozart/assert": "^1.0"
+                "ext-filter": "^7.1",
+                "php": "^7.2",
+                "phpdocumentor/reflection-common": "^2.0",
+                "phpdocumentor/type-resolver": "^1.0",
+                "webmozart/assert": "^1"
             },
             "require-dev": {
-                "doctrine/instantiator": "~1.0.5",
-                "mockery/mockery": "^1.0",
-                "phpunit/phpunit": "^6.4"
+                "doctrine/instantiator": "^1",
+                "mockery/mockery": "^1"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.x-dev"
+                    "dev-master": "5.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "phpDocumentor\\Reflection\\": [
-                        "src/"
-                    ]
+                    "phpDocumentor\\Reflection\\": "src"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -436,44 +610,46 @@
                 {
                     "name": "Mike van Riel",
                     "email": "me@mikevanriel.com"
+                },
+                {
+                    "name": "Jaap van Otterdijk",
+                    "email": "account@ijaap.nl"
                 }
             ],
             "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
-            "time": "2017-11-27T17:38:31+00:00"
+            "time": "2020-02-22T12:28:44+00:00"
         },
         {
             "name": "phpdocumentor/type-resolver",
-            "version": "0.4.0",
+            "version": "1.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/TypeResolver.git",
-                "reference": "9c977708995954784726e25d0cd1dddf4e65b0f7"
+                "reference": "7462d5f123dfc080dfdf26897032a6513644fc95"
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             "dist": {
                 "type": "zip",
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