diff --git a/.travis.yml b/.travis.yml
index c944a8e..a0e2a95 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 language: php
 
 php:
+  - 7.3
   - 7.2
   - 7.1
-  - 7.0
   - hhvm
 
 matrix:
diff --git a/composer.json b/composer.json
index d994caa..fb15408 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "^7.0",
+        "php": "^7.1",
         "symfony/polyfill-mbstring": ">=1.3.1"
     },
     "require-dev": {