diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bfbad11..8ab4cff 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [7.1, 7.2, 7.3, 7.4, 8.0]
+        php: [7.4, 8.0, 8.1]
 
     steps:
     - name: Checkout code
diff --git a/composer.json b/composer.json
index c65a50d..5c46e29 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     ],
     "minimum-stability": "RC",
     "require": {
-        "php": "^7.1 || ^8.0",
+        "php": "^7.4 || ^8.0",
         "codeception/lib-asserts": "^1.13.1",
         "codeception/codeception": "*@dev"
     },
diff --git a/readme.md b/readme.md
index f08a426..df23ddd 100644
--- a/readme.md
+++ b/readme.md
@@ -9,7 +9,7 @@ A Codeception module containing various assertions.
 
 ## Requirements
 
-* `PHP 7.1` or higher.
+* `PHP 7.4` or higher.
 
 ## Installation
 
diff --git a/tests/unit/Codeception/Module/AssertsTest.php b/tests/unit/Codeception/Module/AssertsTest.php
index 48230d9..21b3c76 100644
--- a/tests/unit/Codeception/Module/AssertsTest.php
+++ b/tests/unit/Codeception/Module/AssertsTest.php
@@ -15,8 +15,7 @@
 
 final class AssertsTest extends TestCase
 {
-    /** @var Asserts */
-    protected $module;
+    protected ?Asserts $module = null;
 
     public function _setUp()
     {