diff --git a/composer.phar b/composer.phar
index 0587d15ccf..2eabe229f1 100755
Binary files a/composer.phar and b/composer.phar differ
diff --git a/phpBB/composer.json b/phpBB/composer.json
index 7db6830025..8b7ad07fad 100644
--- a/phpBB/composer.json
+++ b/phpBB/composer.json
@@ -46,6 +46,7 @@
 		"symfony/finder": "~3.4",
 		"symfony/http-foundation": "~3.4",
 		"symfony/http-kernel": "~3.4",
+		"symfony/polyfill-intl-idn": "~1.17.0",
 		"symfony/process": "^3.4",
 		"symfony/proxy-manager-bridge": "~3.4",
 		"symfony/routing": "~3.4",
diff --git a/phpBB/composer.lock b/phpBB/composer.lock
index daf3504174..6d0b2cc721 100644
--- a/phpBB/composer.lock
+++ b/phpBB/composer.lock
@@ -4,7 +4,7 @@
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+    "content-hash": "84937baf871587184b85e7b70e2d50c2",
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@@ -108,16 +108,16 @@
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         {
             "name": "composer/composer",
-            "version": "1.10.13",
+            "version": "1.10.15",
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                 "type": "git",
                 "url": "https://github.com/composer/composer.git",
-                "reference": "47c841ba3b2d3fc0b4b13282cf029ea18b66d78b"
+                "reference": "547c9ee73fe26c77af09a0ea16419176b1cdbd12"
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-                "url": "https://api.github.com/repos/composer/composer/zipball/47c841ba3b2d3fc0b4b13282cf029ea18b66d78b",
-                "reference": "47c841ba3b2d3fc0b4b13282cf029ea18b66d78b",
+                "url": "https://api.github.com/repos/composer/composer/zipball/547c9ee73fe26c77af09a0ea16419176b1cdbd12",
+                "reference": "547c9ee73fe26c77af09a0ea16419176b1cdbd12",
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@@ -198,7 +198,7 @@
                     "type": "tidelift"
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-            "time": "2020-09-09T09:46:34+00:00"
+            "time": "2020-10-13T13:59:09+00:00"
         },
         {
             "name": "composer/installers",
@@ -1091,20 +1091,20 @@
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             "name": "paragonie/random_compat",
-            "version": "v9.99.99",
+            "version": "v9.99.100",
             "source": {
                 "type": "git",
                 "url": "https://github.com/paragonie/random_compat.git",
-                "reference": "84b4dfb120c6f9b4ff7b3685f9b8f1aa365a0c95"
+                "reference": "996434e5492cb4c3edcb9168db6fbb1359ef965a"
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-                "url": "https://api.github.com/repos/paragonie/random_compat/zipball/84b4dfb120c6f9b4ff7b3685f9b8f1aa365a0c95",
-                "reference": "84b4dfb120c6f9b4ff7b3685f9b8f1aa365a0c95",
+                "url": "https://api.github.com/repos/paragonie/random_compat/zipball/996434e5492cb4c3edcb9168db6fbb1359ef965a",
+                "reference": "996434e5492cb4c3edcb9168db6fbb1359ef965a",
                 "shasum": ""
             },
             "require": {
-                "php": "^7"
+                "php": ">= 7"
             },
             "require-dev": {
                 "phpunit/phpunit": "4.*|5.*",
@@ -1132,7 +1132,7 @@
                 "pseudorandom",
                 "random"
             ],
-            "time": "2018-07-02T15:55:56+00:00"
+            "time": "2020-10-15T08:29:30+00:00"
         },
         {
             "name": "patchwork/utf8",
@@ -2407,22 +2407,21 @@
         },
         {
             "name": "symfony/polyfill-intl-idn",
-            "version": "v1.18.1",
+            "version": "v1.17.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "5dcab1bc7146cf8c1beaa4502a3d9be344334251"
+                "reference": "a57f8161502549a742a63c09f0a604997bf47027"
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-                "reference": "5dcab1bc7146cf8c1beaa4502a3d9be344334251",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/a57f8161502549a742a63c09f0a604997bf47027",
+                "reference": "a57f8161502549a742a63c09f0a604997bf47027",
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             },
             "require": {
                 "php": ">=5.3.3",
-                "symfony/polyfill-intl-normalizer": "^1.10",
-                "symfony/polyfill-php70": "^1.10",
+                "symfony/polyfill-mbstring": "^1.3",
                 "symfony/polyfill-php72": "^1.10"
             },
             "suggest": {
@@ -2431,7 +2430,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.18-dev"
+                    "dev-master": "1.17-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -2455,10 +2454,6 @@
                     "name": "Laurent Bassin",
                     "email": "laurent@bassin.info"
                 },
-                {
-                    "name": "Trevor Rowbotham",
-                    "email": "trevor.rowbotham@pm.me"
-                },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
@@ -2488,88 +2483,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-08-04T06:02:08+00:00"
-        },
-        {
-            "name": "symfony/polyfill-intl-normalizer",
-            "version": "v1.18.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-intl-normalizer.git",
-                "reference": "37078a8dd4a2a1e9ab0231af7c6cb671b2ed5a7e"
-            },
-            "dist": {
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-                "url": "https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/37078a8dd4a2a1e9ab0231af7c6cb671b2ed5a7e",
-                "reference": "37078a8dd4a2a1e9ab0231af7c6cb671b2ed5a7e",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.3.3"
-            },
-            "suggest": {
-                "ext-intl": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.18-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Normalizer\\": ""
-                },
-                "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 for intl's Normalizer class and related functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "intl",
-                "normalizer",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2020-07-14T12:35:20+00:00"
+            "time": "2020-06-06T08:46:27+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",