diff --git a/composer.json b/composer.json
old mode 100755
new mode 100644
index 02860067728..36f66ca65ed
--- a/composer.json
+++ b/composer.json
@@ -56,7 +56,7 @@
     "davejamesmiller/laravel-breadcrumbs": "3.*",
     "watson/validating": "3.*",
     "doctrine/dbal": "^2.5",
-    "league/commonmark": "0.15.*",
+    "league/commonmark": "0.18.*",
     "twig/twig": "1.30.0",
     "rcrowe/twigbridge": "0.9.*",
     "league/csv": "8.*",
diff --git a/composer.lock b/composer.lock
index cef2489c1d0..d92ef9c2e5e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,10 +1,10 @@
 {
     "_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": "3570b1bf4768d7a7db0667317e82c668",
+    "content-hash": "1f4c38cbb6fc6f921d3484a9f92b4f1e",
     "packages": [
         {
             "name": "bacon/bacon-qr-code",
@@ -848,34 +848,34 @@
         },
         {
             "name": "league/commonmark",
-            "version": "0.15.4",
+            "version": "0.18.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/thephpleague/commonmark.git",
-                "reference": "c4c8e6bf99e62d9568875d9fc3ef473fe3e18e0c"
+                "reference": "f94e18d68260f43a7d846279cad88405854b1306"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/thephpleague/commonmark/zipball/c4c8e6bf99e62d9568875d9fc3ef473fe3e18e0c",
-                "reference": "c4c8e6bf99e62d9568875d9fc3ef473fe3e18e0c",
+                "url": "https://api.github.com/repos/thephpleague/commonmark/zipball/f94e18d68260f43a7d846279cad88405854b1306",
+                "reference": "f94e18d68260f43a7d846279cad88405854b1306",
                 "shasum": ""
             },
             "require": {
                 "ext-mbstring": "*",
-                "php": ">=5.4.8"
+                "php": ">=5.6.5"
             },
             "replace": {
                 "colinodell/commonmark-php": "*"
             },
             "require-dev": {
                 "cebe/markdown": "~1.0",
+                "commonmark/commonmark.js": "0.28",
                 "erusev/parsedown": "~1.0",
-                "jgm/commonmark": "0.27",
                 "michelf/php-markdown": "~1.4",
-                "mikehaertl/php-shellcommand": "~1.2.0",
-                "phpunit/phpunit": "~4.3|~5.0",
-                "scrutinizer/ocular": "~1.1",
-                "symfony/finder": "~2.3|~3.0"
+                "mikehaertl/php-shellcommand": "^1.2",
+                "phpunit/phpunit": "^5.7.27|^6.5.14",
+                "scrutinizer/ocular": "^1.1",
+                "symfony/finder": "^3.0|^4.0"
             },
             "suggest": {
                 "league/commonmark-extras": "Library of useful extensions including smart punctuation"
@@ -886,7 +886,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "0.16-dev"
+                    "dev-master": "0.19-dev"
                 }
             },
             "autoload": {
@@ -906,14 +906,20 @@
                     "role": "Lead Developer"
                 }
             ],
-            "description": "Markdown parser for PHP based on the CommonMark spec",
+            "description": "PHP Markdown parser based on the CommonMark spec",
             "homepage": "https://github.com/thephpleague/commonmark",
             "keywords": [
                 "commonmark",
                 "markdown",
                 "parser"
             ],
-            "time": "2017-05-09T12:47:53+00:00"
+            "support": {
+                "docs": "https://commonmark.thephpleague.com/",
+                "issues": "https://github.com/thephpleague/commonmark/issues",
+                "rss": "https://github.com/thephpleague/commonmark/releases.atom",
+                "source": "https://github.com/thephpleague/commonmark"
+            },
+            "time": "2019-03-28T13:52:31+00:00"
         },
         {
             "name": "league/csv",
@@ -4844,5 +4850,6 @@
         "ext-curl": "*",
         "ext-zip": "*"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "2.0.0"
 }