diff --git a/composer.json b/composer.json
index 5798bb1121..ae66c52c9e 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,7 @@
         "cboden/ratchet": "^0.4.1",
         "react/zmq": "^0.4.0",
         "guzzlehttp/psr7": "^1.6",
-        "michelf/php-markdown": "^1.8",
+        "michelf/php-markdown": "^1.9",
         "robthree/twofactorauth": "^1.6",
         "nesbot/carbon": "^2.26",
         "zbateson/mail-mime-parser": "1.3.*",
diff --git a/composer.lock b/composer.lock
index c3a16735e5..a98755d031 100644
--- 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": "87105dc022b64332e3634927585487df",
+    "content-hash": "c931ef8213fea73025690b2d7ca50293",
     "packages": [
         {
             "name": "async-aws/core",
@@ -2059,21 +2059,24 @@
         },
         {
             "name": "michelf/php-markdown",
-            "version": "1.8.0",
+            "version": "1.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/michelf/php-markdown.git",
-                "reference": "01ab082b355bf188d907b9929cd99b2923053495"
+                "reference": "c83178d49e372ca967d1a8c77ae4e051b3a3c75c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/michelf/php-markdown/zipball/01ab082b355bf188d907b9929cd99b2923053495",
-                "reference": "01ab082b355bf188d907b9929cd99b2923053495",
+                "url": "https://api.github.com/repos/michelf/php-markdown/zipball/c83178d49e372ca967d1a8c77ae4e051b3a3c75c",
+                "reference": "c83178d49e372ca967d1a8c77ae4e051b3a3c75c",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.0"
             },
+            "require-dev": {
+                "phpunit/phpunit": ">=4.3 <5.8"
+            },
             "type": "library",
             "autoload": {
                 "psr-4": {
@@ -2103,9 +2106,9 @@
             ],
             "support": {
                 "issues": "https://github.com/michelf/php-markdown/issues",
-                "source": "https://github.com/michelf/php-markdown/tree/lib"
+                "source": "https://github.com/michelf/php-markdown/tree/1.9.0"
             },
-            "time": "2018-01-15T00:49:33+00:00"
+            "time": "2019-12-02T02:32:27+00:00"
         },
         {
             "name": "monolog/monolog",
@@ -7573,5 +7576,5 @@
         "ext-exif": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.1.0"
+    "plugin-api-version": "2.0.0"
 }