diff --git a/gravityforms-nl.php b/gravityforms-nl.php
index 66aab52..9f01d9b 100644
--- a/gravityforms-nl.php
+++ b/gravityforms-nl.php
@@ -6,6 +6,7 @@
  *
  * Version: 3.0.6
  * Requires at least: 3.0
+ * Requires PHP: 7.4
  *
  * Author: Pronamic
  * Author URI: https://www.pronamic.eu/
diff --git a/readme.txt b/readme.txt
index d8b4560..f82c219 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,6 +4,7 @@ Tags: gravityforms, gravity, form, forms, gravity forms, translation, dutch, nl,
 Donate link: https://www.pronamic.eu/donate/?for=wp-plugin-gravityforms-nl&source=wp-plugin-readme-txt
 Requires at least: 4.7
 Tested up to: 5.5
+Requires PHP: 7.4
 Stable tag: 3.0.6
 
 This WordPress plugin extends Gravity Forms with Dutch address notation and places the Euro sign to the left of input fields.