diff --git a/.travis.yml b/.travis.yml
index 2c7a0b1..61ab88d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,10 +7,6 @@ cache:
         - $HOME/.composer/cache/files
 
 php:
-    - 5.4
-    - 5.5
-    - 5.6
-    - 7.0
     - 7.1
     - 7.2
     - 7.3
@@ -26,7 +22,7 @@ branches:
 matrix:
     fast_finish: true
     include:
-        - php: 5.4
+        - php: 7.1
           env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci"
         - php: 7.1
           env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest"
diff --git a/composer.json b/composer.json
index 355e82a..96f5996 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": "^5.4 || ^7.0",
+        "php": "^7.1",
         "psr/cache": "^1.0",
         "php-http/client-common": "^1.9 || ^2.0",
         "php-http/message-factory": "^1.0",