diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 672fd50..6655513 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,10 +34,8 @@ jobs:
         with:
           dependency-versions: ${{ matrix.dependencies }}
 
-      - run: vendor/bin/phpunit.phar --colors=always
+      - run: vendor/bin/phpunit --colors=always
 
-      - run: vendor/bin/php-cs-fixer.phar fix --dry-run --diff --ansi -v
+      - run: vendor/bin/php-cs-fixer fix --dry-run --diff --ansi -v
 
-      - run: vendor/bin/phan.phar --no-progress-bar --color
-
-      - run: vendor/bin/composer-require-checker.phar --ansi -vvv
+      - run: vendor/bin/phan --no-progress-bar --color
diff --git a/.travis.yml b/.travis.yml
index 1fd5d63..c2e60bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,20 +10,18 @@ php:
 cache:
   directories:
     - $HOME/.composer/cache/
-    - $HOME/.phive/
 
 before_install:
   - composer install --prefer-dist --no-progress --no-suggest
   - mkdir -p build/logs/
 
 script:
-  - vendor/bin/php-cs-fixer.phar fix --dry-run --diff --ansi -v
-  - vendor/bin/phan.phar --no-progress-bar --color --allow-polyfill-parser
-  - vendor/bin/composer-require-checker.phar --ansi -vvv
-  - vendor/bin/phpunit.phar --colors --coverage-text --coverage-clover build/logs/clover.xml
+  - vendor/bin/php-cs-fixer fix --dry-run --diff --ansi -v
+  - vendor/bin/phan --no-progress-bar --color --allow-polyfill-parser
+  - vendor/bin/phpunit --colors --coverage-text --coverage-clover build/logs/clover.xml
 
 after_success:
-  - travis_retry tools/php-coveralls -v
+  - travis_retry vendor/bin/php-coveralls -v
 
 branches:
   only:
diff --git a/composer.json b/composer.json
index fdae573..c628aca 100644
--- a/composer.json
+++ b/composer.json
@@ -13,23 +13,16 @@
         "preferred-install": "dist",
         "sort-packages": true
     },
-    "repositories": {
-        "pharhub": {
-            "type": "composer",
-            "url": "https://packages.pharhub.dev/"
-        }
-    },
     "require": {
         "php": "^7.2",
         "ext-simplexml": "*",
         "ext-pcre": "*"
     },
     "require-dev": {
-        "pharhub/composer-require-checker": "^2.1",
-        "pharhub/phan": "^3.2",
-        "pharhub/php-coveralls": "^2.4",
-        "pharhub/php-cs-fixer": "^2.17",
-        "pharhub/phpunit": "^8.5"
+        "friendsofphp/php-cs-fixer": "^2.17",
+        "phan/phan": "^4.0",
+        "php-coveralls/php-coveralls": "^2.4",
+        "phpunit/phpunit": "^8.5"
     },
     "autoload": {
         "psr-4": {
@@ -46,28 +39,24 @@
     ],
     "scripts": {
         "test": [
-            "@php vendor/bin/phpunit.phar --colors=always"
+            "@php vendor/bin/phpunit --colors=always"
         ],
         "coverage": [
-            "@php vendor/bin/phpunit.phar --colors=always --coverage-html coverage"
+            "@php vendor/bin/phpunit --colors=always --coverage-html coverage"
         ],
         "cs": [
-            "@php vendor/bin/php-cs-fixer.phar fix --dry-run --diff --ansi -v"
+            "@php vendor/bin/php-cs-fixer fix --dry-run --diff --ansi -v"
         ],
         "fix": [
-            "@php vendor/bin/php-cs-fixer.phar fix --diff --ansi -v"
+            "@php vendor/bin/php-cs-fixer fix --diff --ansi -v"
         ],
         "phan": [
-            "@php vendor/bin/phan.phar -p --color"
-        ],
-        "composer-require-checker": [
-            "@php vendor/bin/composer-require-checker.phar --ansi -vvv"
+            "@php vendor/bin/phan -p --color"
         ],
         "qa": [
             "@composer cs",
             "@composer phan",
-            "@composer test",
-            "@composer composer-require-checker"
+            "@composer test"
         ]
     }
 }
diff --git a/tests/SampleTest.php b/tests/SampleTest.php
index 43d6e89..88c01c1 100644
--- a/tests/SampleTest.php
+++ b/tests/SampleTest.php
@@ -3,8 +3,8 @@
 
 use ngyuki\Skeleton\Sample;
 use PHPUnit\Framework\TestCase;
-use function PHPUnit\assertEquals;
-use function PHPUnit\assertFalse;
+use function assertEquals;
+use function assertFalse;
 
 /**
  * @author ngyuki