diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 943198e0..1d75bf83 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -13,13 +13,12 @@ jobs:
     strategy:
       matrix:
         php-version:
+          - "7.1"
+          - "7.2"
           - "7.3"
           - "7.4"
           - "8.0"
           - "8.1"
-          - "8.2"
-          - "8.3"
-          - "8.4"
 
     steps:
     - uses: actions/checkout@v2
@@ -35,7 +34,7 @@ jobs:
 
     - name: Cache Composer packages
       id: composer-cache
-      uses: actions/cache@v4
+      uses: actions/cache@v2
       with:
         path: vendor
         key: ${{ runner.os }}-php-composer-${{ matrix.php-version }}-${{ hashFiles('**/composer.lock') }}
@@ -61,7 +60,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "7.3"
+          php-version: "7.4"
           ini-values: post_max_size=256M, max_execution_time=180
           coverage: xdebug
 
@@ -92,7 +91,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "7.3"
+          php-version: "7.4"
           ini-values: post_max_size=256M, max_execution_time=180
 
       - name: Install dependencies
diff --git a/composer.json b/composer.json
index d6cdce05..d99c0b8b 100644
--- a/composer.json
+++ b/composer.json
@@ -9,18 +9,19 @@
         }
     ],
     "require": {
-        "php": ">=7.3",
+        "php": ">=7.1",
         "ext-json": "*"
     },
     "require-dev": {
         "ext-gettext": "*",
-        "php-coveralls/php-coveralls": "^2.7",
-        "phpmd/phpmd": "^2.15",
-        "phpunit/phpunit": "^9.6",
         "sokil/php-isocodes-db-i18n": "^4.0.0",
-        "squizlabs/php_codesniffer": "^3.11",
+        "phpunit/phpunit": ">=7.5.20",
+        "php-coveralls/php-coveralls": "^2.1",
+        "squizlabs/php_codesniffer": "^3.4",
+        "phpmd/phpmd" : "@stable",
         "symfony/translation": "^4.4.17|^5.2",
-        "vimeo/psalm": "^4.30"
+        "vimeo/psalm": "^4.3",
+        "infection/infection": ">=0.11.5"
     },
     "autoload": {
         "psr-4": {
@@ -52,7 +53,6 @@
     "config": {
         "allow-plugins": {
             "infection/extension-installer": true
-        },
-        "sort-packages": true
+        }
     }
 }
diff --git a/tests/docker/docker-php-entrypoint b/tests/docker/docker-php-entrypoint
index c776d20a..421f949b 100755
--- a/tests/docker/docker-php-entrypoint
+++ b/tests/docker/docker-php-entrypoint
@@ -14,4 +14,4 @@ echo "uk_UA.UTF-8 UTF-8" > /etc/locale.gen
 locale-gen
 
 # run tests
-/php-isocodes/vendor/bin/phpunit /php-isocodes/tests
+/php-isocodes/vendor/bin/phpunit -c /php-isocodes/tests/phpunit.xml /php-isocodes/tests
\ No newline at end of file