diff --git a/.travis.yml b/.travis.yml
index c1d4021..0fe84eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,6 @@
 language: php
 
-php:
-  - '7.0'
-  - '7.1'
+php: '>=7.0'
 
 # Install packages and create test coverage log directory.
 before_script:
diff --git a/composer.json b/composer.json
index 5126143..ca9ec62 100644
--- a/composer.json
+++ b/composer.json
@@ -12,13 +12,13 @@
         }
     ],
     "require": {
-        "php": "^7.0",
-        "php-curl-class/php-curl-class": "^7.1"
+        "php": ">=7.0",
+        "php-curl-class/php-curl-class" ">=7.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7",
-        "satooshi/php-coveralls": "^1.0",
-        "squizlabs/php_codesniffer": "^2.8"
+        "phpunit/phpunit": ">=5.7",
+        "satooshi/php-coveralls": ">=1.0",
+        "squizlabs/php_codesniffer": ">=2.8"
     },
     "autoload": {
         "psr-4": {"DayRev\\Smmry\\": "src/"}