diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..a229004
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+/.gitattributes export-ignore
+/.gitignore export-ignore
+/.pullapprove.yml export-ignore
diff --git a/README.md b/README.md
index 41d362a..bf8913b 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,12 @@
 HTTP Factories
 ==============
 
-This repository holds all interfaces related to [PSR-17 (HTTP Message Factories)][psr-17]. 
-Please refer to the specification for a description.
+This repository holds all interfaces related to [PSR-17 (HTTP Factories)][psr-url].
 
-You can find implementations of the specification by looking for packages providing the 
-[psr/http-factory-implementation](https://packagist.org/providers/psr/http-factory-implementation) virtual package.
+Note that this is not a HTTP Factory implementation of its own. It is merely interfaces that describe the components of a HTTP Factory.
 
-[psr-17]: https://www.php-fig.org/psr/psr-17/
+The installable [package][package-url] and [implementations][implementation-url] are listed on Packagist.
+
+[psr-url]: https://www.php-fig.org/psr/psr-17/
+[package-url]: https://packagist.org/packages/psr/http-factory
+[implementation-url]: https://packagist.org/providers/psr/http-factory-implementation
diff --git a/composer.json b/composer.json
index af62b29..d1bbdde 100644
--- a/composer.json
+++ b/composer.json
@@ -15,12 +15,12 @@
     "authors": [
         {
             "name": "PHP-FIG",
-            "homepage": "http://www.php-fig.org/"
+            "homepage": "https://www.php-fig.org/"
         }
     ],
     "require": {
         "php": ">=7.0.0",
-        "psr/http-message": "^1.0"
+        "psr/http-message": "^1.0 || ^2.0"
     },
     "autoload": {
         "psr-4": {