diff --git a/.travis.yml b/.travis.yml
index 9e10589..913e1aa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ php:
 - 7.1
 - 7.2
 - 7.3
+- 7.4
 
 matrix:
   fast_finish: true
@@ -33,7 +34,7 @@ jobs:
     env: TEST_COMMAND="./vendor/bin/phpunit" DEPENDENCIES="phpunit/phpunit:^7.5 nyholm/psr7:^1.0"
 
     # Latest dev release
-  - php: 7.3
+  - php: 7.4
     env: STABILITY="dev"
 
 before_install:
diff --git a/composer.json b/composer.json
index bc853de..2eb548d 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "require-dev": {
         "doctrine/instantiator": "^1.1",
         "guzzlehttp/psr7": "^1.4",
-        "phpspec/phpspec": "^5.1",
+        "phpspec/phpspec": "^5.1 || ^6.0",
         "phpspec/prophecy": "^1.8",
         "sebastian/comparator": "^3.0"
     },