diff --git a/composer.json b/composer.json
index 836a5b8..41bbdac 100644
--- a/composer.json
+++ b/composer.json
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-        "symfony/symfony": "3.3.*",
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diff --git a/composer.lock b/composer.lock
index cb20e3d..5f2059a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,10 +1,10 @@
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-        "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",
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@@ -67,35 +67,35 @@
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@@ -131,7 +131,11 @@
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+            "support": {
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@@ -201,32 +205,37 @@
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@@ -267,20 +276,24 @@
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+            "support": {
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@@ -340,7 +353,11 @@
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@@ -822,6 +839,9 @@
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@@ -902,8 +925,8 @@
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@@ -924,13 +947,20 @@
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@@ -1122,7 +1155,7 @@
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@@ -1134,7 +1167,11 @@
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@@ -1783,11 +1819,6 @@
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@@ -1811,7 +1842,21 @@
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@@ -1998,23 +2043,23 @@
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@@ -2039,10 +2084,16 @@
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@@ -2186,6 +2237,9 @@
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@@ -2235,6 +2289,10 @@
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@@ -2284,20 +2342,23 @@
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@@ -2331,20 +2392,23 @@
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@@ -2664,16 +2731,16 @@
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                 "url": "https://github.com/twigphp/Twig.git",
-                "reference": "55e4beb721a044db9e31ae0470024fc205b6a008"
+                "reference": "87b2ea9d8f6fd014d0621ca089bb1b3769ea3f8e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/twigphp/Twig/zipball/55e4beb721a044db9e31ae0470024fc205b6a008",
-                "reference": "55e4beb721a044db9e31ae0470024fc205b6a008",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/87b2ea9d8f6fd014d0621ca089bb1b3769ea3f8e",
+                "reference": "87b2ea9d8f6fd014d0621ca089bb1b3769ea3f8e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": ">=5.5.0",
+                "symfony/polyfill-ctype": "^1.8"
             },
             "require-dev": {
                 "psr/container": "^1.0",
-                "symfony/debug": "~2.7",
-                "symfony/phpunit-bridge": "~3.3@dev"
+                "symfony/phpunit-bridge": "^4.4|^5.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.34-dev"
+                    "dev-master": "1.42-dev"
                 }
             },
             "autoload": {
@@ -3258,23 +3552,26 @@
                     "homepage": "http://fabien.potencier.org",
                     "role": "Lead Developer"
                 },
+                {
+                    "name": "Twig Team",
+                    "role": "Contributors"
+                },
                 {
                     "name": "Armin Ronacher",
                     "email": "armin.ronacher@active-4.com",
                     "role": "Project Founder"
-                },
-                {
-                    "name": "Twig Team",
-                    "homepage": "http://twig.sensiolabs.org/contributors",
-                    "role": "Contributors"
                 }
             ],
             "description": "Twig, the flexible, fast, and secure template language for PHP",
-            "homepage": "http://twig.sensiolabs.org",
+            "homepage": "https://twig.symfony.com",
             "keywords": [
                 "templating"
             ],
-            "time": "2017-06-06T03:56:50+00:00"
+            "support": {
+                "issues": "https://github.com/twigphp/Twig/issues",
+                "source": "https://github.com/twigphp/Twig/tree/1.x"
+            },
+            "time": "2020-02-11T05:59:23+00:00"
         },
         {
             "name": "willdurand/jsonp-callback-validator",
@@ -3599,7 +3896,8 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.5.9"
+        "php": "5.6.x"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "2.3.0"
 }