diff --git a/composer.json b/composer.json
index 10ce369..a11e22b 100644
--- a/composer.json
+++ b/composer.json
@@ -7,11 +7,11 @@
     "authors": [
         {
             "name": "PHP-FIG",
-            "homepage": "http://www.php-fig.org/"
+            "homepage": "https://www.php-fig.org/"
         }
     ],
     "require": {
-        "php": ">=7.2.0"
+        "php": "^7.2.0 || ^8.0.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/MessageInterface.php b/src/MessageInterface.php
index fb15f78..a83c985 100644
--- a/src/MessageInterface.php
+++ b/src/MessageInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psr\Http\Message;
 
 /**
diff --git a/src/RequestInterface.php b/src/RequestInterface.php
index 165b76b..5c60cbe 100644
--- a/src/RequestInterface.php
+++ b/src/RequestInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psr\Http\Message;
 
 /**
diff --git a/src/ResponseInterface.php b/src/ResponseInterface.php
index b2aa937..e9299a9 100644
--- a/src/ResponseInterface.php
+++ b/src/ResponseInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psr\Http\Message;
 
 /**
diff --git a/src/ServerRequestInterface.php b/src/ServerRequestInterface.php
index a5aff59..8625d0e 100644
--- a/src/ServerRequestInterface.php
+++ b/src/ServerRequestInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psr\Http\Message;
 
 /**
diff --git a/src/StreamInterface.php b/src/StreamInterface.php
index e6d2a50..46a9a48 100644
--- a/src/StreamInterface.php
+++ b/src/StreamInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psr\Http\Message;
 
 /**
diff --git a/src/UploadedFileInterface.php b/src/UploadedFileInterface.php
index 8b7b494..3cb8f42 100644
--- a/src/UploadedFileInterface.php
+++ b/src/UploadedFileInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psr\Http\Message;
 
 /**
diff --git a/src/UriInterface.php b/src/UriInterface.php
index 1a321da..4b5f4f2 100644
--- a/src/UriInterface.php
+++ b/src/UriInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psr\Http\Message;
 
 /**