diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 05eb61e3..fe87b8ed 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: [ '8.1', '8.2', '8.3', '8.4' ]
+        php-version: [ '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
     steps:
       - uses: "actions/checkout@v4"
       - uses: "shivammathur/setup-php@v2"
@@ -72,7 +72,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: [ '8.1', '8.2', '8.3', '8.4' ]
+        php-version: [ '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
     steps:
       - uses: "actions/checkout@v4"
       - uses: "shivammathur/setup-php@v2"
diff --git a/README.md b/README.md
index b5861898..37a127d1 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,11 @@ We support the following versions of PHP:
 * PHP 8.3
 * PHP 8.2
 * PHP 8.1
+* PHP 8.0
+* PHP 7.4
+* PHP 7.3
+* PHP 7.2
+* PHP 7.1
 
 ## Provider Clients
 
diff --git a/composer.json b/composer.json
index bf2e996e..397def0b 100644
--- a/composer.json
+++ b/composer.json
@@ -6,14 +6,14 @@
         "sort-packages": true
     },
     "require": {
-        "php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
+        "php": "^7.1 || >=8.0.0 <8.5.0",
         "ext-json": "*",
         "guzzlehttp/guzzle": "^7.0"
     },
     "require-dev": {
-        "mockery/mockery": "^1.6",
+        "mockery/mockery": "^1.3.5",
         "php-parallel-lint/php-parallel-lint": "^1.4",
-        "phpunit/phpunit": "^10.5 || ^11.5",
+        "phpunit/phpunit": "^7 || ^8 || ^9 || ^10 || ^11",
         "squizlabs/php_codesniffer": "^3.11"
     },
     "keywords": [