diff --git a/.travis.yml b/.travis.yml
index c9bb7fc..299fe07 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,10 +28,7 @@ before_install:
     - phpenv config-rm xdebug.ini || true
     - composer selfupdate
 
-install:
-    - composer install --dev --prefer-dist
-    - composer require react/promise:2.*
-    - composer require psr/http-message:1.*
+install: composer install --dev --prefer-dist
 
 script: if [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then bin/phpunit --coverage-clover build/logs/clover.xml --group default,ReactPromise; else bin/phpunit --group default,ReactPromise; fi
 
diff --git a/composer.json b/composer.json
index 54d19a6..4178927 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,8 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^4.8",
-    "psr/http-message": "^1.0"
+    "psr/http-message": "^1.0",
+    "react/promise": "2.*"
   },
   "config": {
     "bin-dir": "bin",