diff --git a/.travis.yml b/.travis.yml
index 01e3210..27299f1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: php
 sudo: false
 
 php:
+  - 5.6
   - 7.0
   - 7.1
   - 7.2
diff --git a/composer.json b/composer.json
index 5f0accb..fb5bcbc 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
       }
     ],
     "require": {
-        "php": ">=7.0.0",
+        "php": ">=5.7",
         "lib/curl": "*"
     },
     "autoload": {