1 files changed, 1 insertions, 0 deletions
diff --git a/composer.json b/composer.json
index aad9437..f0c9921 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,7 @@
     "minimum-stability": "dev",
     "require": {
         "simplepie/simplepie": "1.3.1",
+        "php": ">= 5.4",
         "mustangostang/spyc": "0.5.1"
     }
 }