diff --git a/.travis.yml b/.travis.yml
index 7a43261..e9c8d24 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,9 +7,6 @@ env:
 matrix:
   fast_finish: true
   include:
-    - php: 7.1
-    - php: 7.1
-      env: setup=lowest
     - php: 7.2
     - php: 7.2
       env: setup=lowest
diff --git a/composer.json b/composer.json
index 2089ebd..38da9e2 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,8 @@
         }
     ],
     "require": {
-        "ext-json": "*"
+        "ext-json": "*",
+        "php": "^7.2"
     },
     "require-dev": {
         "orchestra/testbench": "^5.0"