diff --git a/.travis.yml b/.travis.yml
index 914e00b..0aea3d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,6 @@ language: php
 dist: trusty
 
 php:
-    - 5.4
     - 5.5
     - 5.6
     - 7.0
diff --git a/composer.json b/composer.json
index 9fd5e42..2eca138 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
     "API"
   ],
   "require": {
-    "php": ">=5.4,<8.0-DEV",
+    "php": ">=5.5,<8.0-DEV",
     "ext-mbstring": "*"
   },
   "require-dev": {