diff --git a/composer.json b/composer.json
index 31b14bb7..c482a408 100644
--- a/composer.json
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@@ -51,7 +51,8 @@
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diff --git a/composer.lock b/composer.lock
index dd667c4c..4e952be3 100644
--- a/composer.lock
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@@ -4,7 +4,7 @@
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             "name": "clue/stream-filter",
@@ -7435,6 +7435,186 @@
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+                },
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+                    "email": "me@kelunik.com"
+                }
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+                "promise"
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+            "license": [
+                "MIT"
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+                    "email": "aaron@trowski.com"
+                },
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+                    "email": "me@kelunik.com"
+                }
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+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
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+                }
+            ],
+            "description": "Restarts a process without xdebug.",
+            "keywords": [
+                "Xdebug",
+                "performance"
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+            "time": "2019-05-27T17:52:04+00:00"
+        },
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@@ -7485,6 +7665,140 @@
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         },
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+                "php": ">=7.0",
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+            "notification-url": "https://packagist.org/downloads/",
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+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "A more advanced JSONRPC implementation",
+            "time": "2019-09-12T22:41:08+00:00"
+        },
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+            },
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+            "notification-url": "https://packagist.org/downloads/",
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+                "language",
+                "microsoft",
+                "php",
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+                "squizlabs/php_codesniffer": "~1.5"
+            },
+            "type": "library",
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+            "license": [
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+                    "role": "Developer",
+                    "email": "cweiske@cweiske.de",
+                    "homepage": "http://github.com/cweiske/jsonmapper/"
+                }
+            ],
+            "description": "Map nested JSON structures onto PHP classes",
+            "time": "2019-08-15T19:41:25+00:00"
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@@ -7536,6 +7850,55 @@
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+                    "email": "spudz76@gmail.com",
+                    "homepage": "https://www.nullivex.com"
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+            "time": "2019-03-29T20:06:56+00:00"
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@@ -7751,6 +8114,62 @@
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+            "notification-url": "https://packagist.org/downloads/",
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+                    "email": "mail@kore-nordmann.de"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
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+            ],
+            "description": "Diff implementation",
+            "homepage": "https://github.com/sebastianbergmann/diff",
+            "keywords": [
+                "diff",
+                "udiff",
+                "unidiff",
+                "unified diff"
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+            "time": "2019-02-04T06:01:07+00:00"
+        },
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@@ -8409,6 +8828,186 @@
             "description": "Symfony WebServerBundle",
             "homepage": "https://symfony.com",
             "time": "2019-08-20T14:27:59+00:00"
+        },
+        {
+            "name": "vimeo/psalm",
+            "version": "3.5.1",
+            "source": {
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+                "url": "https://github.com/vimeo/psalm.git",
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+                "psalm-language-server",
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+            "type": "library",
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+            "notification-url": "https://packagist.org/downloads/",
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+            ],
+            "description": "A robust cross-platform utility for normalizing, comparing and modifying file paths.",
+            "time": "2015-12-17T08:42:14+00:00"
         }
     ],
     "aliases": [],
diff --git a/psalm.xml b/psalm.xml
new file mode 100644
index 00000000..42f355b2
--- /dev/null
+++ b/psalm.xml
@@ -0,0 +1,55 @@
+<?xml version="1.0"?>
+<psalm
+    totallyTyped="false"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+
+    <issueHandlers>
+        <LessSpecificReturnType errorLevel="info" />
+
+        <!-- level 3 issues - slightly lazy code writing, but provably low false-negatives -->
+
+        <DeprecatedMethod errorLevel="info" />
+        <DeprecatedProperty errorLevel="info" />
+        <DeprecatedClass errorLevel="info" />
+        <DeprecatedConstant errorLevel="info" />
+        <DeprecatedFunction errorLevel="info" />
+        <DeprecatedInterface errorLevel="info" />
+        <DeprecatedTrait errorLevel="info" />
+
+        <InternalMethod errorLevel="info" />
+        <InternalProperty errorLevel="info" />
+        <InternalClass errorLevel="info" />
+
+        <MissingClosureReturnType errorLevel="info" />
+        <MissingReturnType errorLevel="info" />
+        <MissingPropertyType errorLevel="info" />
+        <InvalidDocblock errorLevel="info" />
+        <MisplacedRequiredParam errorLevel="info" />
+
+        <PropertyNotSetInConstructor errorLevel="info" />
+        <MissingConstructor errorLevel="info" />
+        <MissingClosureParamType errorLevel="info" />
+        <MissingParamType errorLevel="info" />
+
+        <RedundantCondition errorLevel="info" />
+
+        <DocblockTypeContradiction errorLevel="info" />
+        <RedundantConditionGivenDocblockType errorLevel="info" />
+
+        <UnresolvableInclude errorLevel="info" />
+
+        <RawObjectIteration errorLevel="info" />
+
+        <InvalidStringClass errorLevel="info" />
+    </issueHandlers>
+</psalm>
diff --git a/symfony.lock b/symfony.lock
index 561a210c..d8d76bac 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -1,7 +1,16 @@
 {
+    "amphp/amp": {
+        "version": "v2.2.1"
+    },
+    "amphp/byte-stream": {
+        "version": "v1.6.1"
+    },
     "clue/stream-filter": {
         "version": "v1.4.1"
     },
+    "composer/xdebug-handler": {
+        "version": "1.3.3"
+    },
     "doctrine/annotations": {
         "version": "1.0",
         "recipe": {
@@ -96,6 +105,12 @@
     "egulias/email-validator": {
         "version": "2.1.7"
     },
+    "felixfbecker/advanced-json-rpc": {
+        "version": "v3.0.4"
+    },
+    "felixfbecker/language-server-protocol": {
+        "version": "v1.4.0"
+    },
     "fig/link-util": {
         "version": "1.0.0"
     },
@@ -132,6 +147,9 @@
     "monolog/monolog": {
         "version": "1.24.0"
     },
+    "netresearch/jsonmapper": {
+        "version": "v1.6.0"
+    },
     "nikic/php-parser": {
         "version": "v4.2.1"
     },
@@ -165,6 +183,9 @@
             "./config/packages/datatables.yaml"
         ]
     },
+    "openlss/lib-array2xml": {
+        "version": "1.0.0"
+    },
     "php-http/curl-client": {
         "version": "2.0.0"
     },
@@ -231,6 +252,9 @@
     "s9e/text-formatter": {
         "version": "1.4.1"
     },
+    "sebastian/diff": {
+        "version": "3.0.2"
+    },
     "sensio/framework-extra-bundle": {
         "version": "5.2",
         "recipe": {
@@ -647,9 +671,18 @@
     "twig/twig": {
         "version": "v2.6.2"
     },
+    "vimeo/psalm": {
+        "version": "3.5.1"
+    },
     "webmozart/assert": {
         "version": "1.4.0"
     },
+    "webmozart/glob": {
+        "version": "4.1.0"
+    },
+    "webmozart/path-util": {
+        "version": "2.3.0"
+    },
     "zendframework/zend-code": {
         "version": "3.3.1"
     },