diff --git a/.travis.yml b/.travis.yml
index d576bdb..c0dc070 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,15 @@ php:
   - 5.4
   - 5.5
   - 5.6
-  - 7
+  - 7.0
+  - 7.1
+  - nightly
   - hhvm
 
+matrix:
+  allow_failures:
+    - php: nightly
+
 install:
   - composer install --prefer-source
 
diff --git a/README.md b/README.md
index dce4b60..cbf3aee 100644
--- a/README.md
+++ b/README.md
@@ -1035,6 +1035,11 @@ $ composer require react/stream:^0.6
 
 More details about version upgrades can be found in the [CHANGELOG](CHANGELOG.md).
 
+This project aims to run on any platform and thus does not require any PHP
+extensions and supports running on legacy PHP 5.3 through current PHP 7+ and HHVM.
+It's *highly recommended to use PHP 7+* for this project due to its vast
+performance improvements.
+
 ## Tests
 
 To run the test suite, you first need to clone this repo and then install all