diff --git a/.travis.yml b/.travis.yml
index 22fa2677..4449ba85 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,6 +23,7 @@ jobs:
   allow_failures:
     - php: nightly
     - env: STATIC_ANALYSIS=1
+    - env: MUTATION_TESTS=1
 
   include:
     - stage: Code Quality
diff --git a/composer.json b/composer.json
index 63e0a583..2cce36ed 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
     },
     "require-dev": {
         "doctrine/coding-standard": "^4.0",
-        "infection/infection": "^0.8",
+        "infection/infection": "dev-master@dev",
         "jms/serializer": "^1.11",
         "league/plates": "^3.3",
         "middlewares/negotiation": "^1.0",