diff --git a/.travis.yml b/.travis.yml
index 80fe6acefb5..ea4b690d07c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ before_install:
 
 install:
  - composer --prefer-source install
- 
+
 before_script:
  - git submodule --quiet update --init --recursive
  - (cd php-tests/library/Mustache; git checkout master)
diff --git a/composer.json b/composer.json
index b007453eeff..2e6adefb236 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
         "php": "~5.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "*@stable"
+        "phpunit/phpunit": "3.7.*"
     },
     "license": "MIT",
     "authors": [