diff --git a/composer.json b/composer.json
index 20bffd0f..702a33ad 100644
--- a/composer.json
+++ b/composer.json
@@ -7,9 +7,14 @@
         "issues": "https://github.com/flashwave/misuzu/issues"
     },
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-        "php": "^7.2",
-        "ext-bcmath": "*",
+        "php": "^7.4",
+        "ext-curl": "*",
+        "ext-intl": "*",
+        "ext-json": "*",
         "ext-mbstring": "*",
+        "ext-pdo": "*",
+        "ext-xml": "*",
+        "ext-zip": "*",
         "twig/twig": "^2.0",
         "swiftmailer/swiftmailer": "~6.0",
         "erusev/parsedown": "~1.6",
diff --git a/composer.lock b/composer.lock
index fc10e259..e735944b 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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         "This file is @generated automatically"
     ],
-    "content-hash": "9d392430e326cc07adcdb41f72c0f2cc",
+    "content-hash": "400b588939ef5651adf2ca9ca06dd090",
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             "name": "chillerlan/php-qrcode",
@@ -124,16 +124,16 @@
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         {
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-            "version": "1.2.4",
+            "version": "1.2.5",
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                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "10bb96592168a0f8e8f6dcde3532d9fa50b0b527"
+                "reference": "62e8fc2dc550e5d6d8c9360c7721662670f58149"
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-                "reference": "10bb96592168a0f8e8f6dcde3532d9fa50b0b527",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/62e8fc2dc550e5d6d8c9360c7721662670f58149",
+                "reference": "62e8fc2dc550e5d6d8c9360c7721662670f58149",
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@@ -144,7 +144,7 @@
             "require-dev": {
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                 "psr/log": "^1.0",
-                "symfony/process": "^2.5 || ^3.0 || ^4.0"
+                "symfony/process": "^2.5 || ^3.0 || ^4.0 || ^5.0"
             },
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             "extra": {
@@ -176,7 +176,7 @@
                 "ssl",
                 "tls"
             ],
-            "time": "2019-08-30T08:44:50+00:00"
+            "time": "2019-12-11T14:44:42+00:00"
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         {
             "name": "composer/installers",
@@ -529,26 +529,27 @@
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-            "version": "v2.9.0",
+            "version": "v2.10.0",
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                 "url": "https://github.com/maxmind/GeoIP2-php.git",
-                "reference": "a807fbf65212eef5d8d2db1a1b31082b53633d77"
+                "reference": "419557cd21d9fe039721a83490701a58c8ce784a"
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-                "reference": "a807fbf65212eef5d8d2db1a1b31082b53633d77",
+                "url": "https://api.github.com/repos/maxmind/GeoIP2-php/zipball/419557cd21d9fe039721a83490701a58c8ce784a",
+                "reference": "419557cd21d9fe039721a83490701a58c8ce784a",
                 "shasum": ""
             },
             "require": {
-                "maxmind-db/reader": "~1.0",
-                "maxmind/web-service-common": "~0.5",
-                "php": ">=5.4"
+                "ext-json": "*",
+                "maxmind-db/reader": "~1.5",
+                "maxmind/web-service-common": "~0.6",
+                "php": ">=5.6"
             },
             "require-dev": {
                 "friendsofphp/php-cs-fixer": "2.*",
-                "phpunit/phpunit": "4.*",
+                "phpunit/phpunit": "5.*",
                 "squizlabs/php_codesniffer": "3.*"
             },
             "type": "library",
@@ -565,7 +566,7 @@
                 {
                     "name": "Gregory J. Oschwald",
                     "email": "goschwald@maxmind.com",
-                    "homepage": "http://www.maxmind.com/"
+                    "homepage": "https://www.maxmind.com/"
                 }
             ],
             "description": "MaxMind GeoIP2 PHP API",
@@ -577,7 +578,7 @@
                 "geolocation",
                 "maxmind"
             ],
-            "time": "2018-04-10T15:32:59+00:00"
+            "time": "2019-12-12T18:48:39+00:00"
         },
         {
             "name": "jublonet/codebird-php",
@@ -640,16 +641,16 @@
         },
         {
             "name": "maxmind-db/reader",
-            "version": "v1.5.0",
+            "version": "v1.5.1",
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                 "type": "git",
                 "url": "https://github.com/maxmind/MaxMind-DB-Reader-php.git",
-                "reference": "bd436094fc0a9b0558a899fb80b0ae34fe1808a0"
+                "reference": "f096bbe4d37e3d93e62626297bfc2179472a972d"
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-                "reference": "bd436094fc0a9b0558a899fb80b0ae34fe1808a0",
+                "url": "https://api.github.com/repos/maxmind/MaxMind-DB-Reader-php/zipball/f096bbe4d37e3d93e62626297bfc2179472a972d",
+                "reference": "f096bbe4d37e3d93e62626297bfc2179472a972d",
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@@ -693,31 +694,31 @@
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                 "maxmind"
             ],
-            "time": "2019-09-30T22:56:38+00:00"
+            "time": "2019-12-12T18:32:55+00:00"
         },
         {
             "name": "maxmind/web-service-common",
-            "version": "v0.5.0",
+            "version": "v0.6.0",
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                 "url": "https://github.com/maxmind/web-service-common-php.git",
-                "reference": "61a9836fa3bb1743ab89752bae5005d71e78c73b"
+                "reference": "40c928bb0194c45088b369a17f9baef9c3fc7460"
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-                "reference": "61a9836fa3bb1743ab89752bae5005d71e78c73b",
+                "url": "https://api.github.com/repos/maxmind/web-service-common-php/zipball/40c928bb0194c45088b369a17f9baef9c3fc7460",
+                "reference": "40c928bb0194c45088b369a17f9baef9c3fc7460",
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                 "ext-curl": "*",
                 "ext-json": "*",
-                "php": ">=5.4"
+                "php": ">=5.6"
             },
             "require-dev": {
                 "friendsofphp/php-cs-fixer": "2.*",
-                "phpunit/phpunit": "4.*",
+                "phpunit/phpunit": "^4.8.36 || ^5.7 || ^6.5 || ^7.0",
                 "squizlabs/php_codesniffer": "3.*"
             },
             "type": "library",
@@ -739,7 +740,7 @@
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             "description": "Internal MaxMind Web Service API",
             "homepage": "https://github.com/maxmind/web-service-common-php",
-            "time": "2018-02-12T22:31:54+00:00"
+            "time": "2019-12-12T15:56:05+00:00"
         },
         {
             "name": "psr/log",
@@ -1273,9 +1274,14 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.2",
-        "ext-bcmath": "*",
-        "ext-mbstring": "*"
+        "php": "^7.4",
+        "ext-curl": "*",
+        "ext-intl": "*",
+        "ext-json": "*",
+        "ext-mbstring": "*",
+        "ext-pdo": "*",
+        "ext-xml": "*",
+        "ext-zip": "*"
     },
     "platform-dev": []
 }