diff --git a/.travis.yml b/.travis.yml
index a193d13..f141c3b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,8 @@
 sudo: false
 language: php
 php:
+  - "7.3"
   - "7.2"
   - "7.1"
   - "7.0"
-  - "5.6"
-  - "5.5"
 script: ./test/run
diff --git a/composer.json b/composer.json
index 1d19f8d..00931a5 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     }
   ],
   "require": {
-    "php": ">=5.5.0"
+    "php": ">=7.0.0"
   },
   "bin": ["bin/coverage-check"]
 }