diff --git a/.forgejo/workflows/phpunit.yml b/.forgejo/workflows/phpunit.yml
index a893dce..61b7867 100644
--- a/.forgejo/workflows/phpunit.yml
+++ b/.forgejo/workflows/phpunit.yml
@@ -21,7 +21,7 @@ jobs:
           MYSQL_ROOT_PASSWORD: root
     strategy:
       matrix:
-        php-version: ['8.1', '8.2', '8.3']
+        php-version: ['7.4', '8.1', '8.2', '8.3']
     name: PHPUnit – PHP ${{ matrix.php-version }}
     env:
       extensions: mysql
diff --git a/README.md b/README.md
index 07aceea..388b496 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Tags: events, fediverse, activitypub, calendar
 Requires at least: 6.5  
 Tested up to: 6.6  
 Stable tag: 0.1.0  
-Requires PHP: 8.1  
+Requires PHP: 7.4  
 License: AGPL-3.0-or-later  
 License URI: https://www.gnu.org/licenses/agpl-3.0.html  
 
diff --git a/activitypub-event-bridge.php b/activitypub-event-bridge.php
index b1cb2ea..4de5843 100644
--- a/activitypub-event-bridge.php
+++ b/activitypub-event-bridge.php
@@ -9,7 +9,7 @@
  * Text Domain:  activitypub-event-bridge
  * License:      AGPL-3.0-or-later
  * License URI:  https://www.gnu.org/licenses/agpl-3.0.de.html
- * Requires PHP: 8.1
+ * Requires PHP: 7.4
  *
  * Requires at least ActivityPub plugin with version >= 3.2.2. ActivityPub plugin tested up to: 3.3.3.
  *
diff --git a/readme.txt b/readme.txt
index d0b9c7e..ec7b1f2 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Tags: events, fediverse, activitypub, calendar
 Requires at least: 6.5
 Tested up to: 6.6
 Stable tag: 0.1.0
-Requires PHP: 8.1
+Requires PHP: 7.4
 License: AGPL-3.0-or-later
 License URI: https://www.gnu.org/licenses/agpl-3.0.html
 Integrating popular event plugins with the ActivityPub plugin.