diff --git a/.travis.yml b/.travis.yml
index dc5d2fd..c1f2f82 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,8 +11,16 @@ php:
     - 7.4
     - 8.0
 
+env:
+    - SYMFONY_VERSION=~4.3
+    - SYMFONY_VERSION=~5.0
+    - SYMFONY_VERSION=~6.0
+
 before_script:
     - phpenv config-rm xdebug.ini;
+    - composer require symfony/event-dispatcher:${SYMFONY_VERSION} --no-update --dev
+    - composer require symfony/property-access:${SYMFONY_VERSION} --no-update --dev
+    - composer require symfony/expression-language:${SYMFONY_VERSION} --no-update --dev
     - composer --no-interaction --prefer-source install
 
 script:
diff --git a/composer.json b/composer.json
index ae42570..4818be7 100644
--- a/composer.json
+++ b/composer.json
@@ -14,15 +14,15 @@
     ],
     "require": {
         "php":                         "^7.1.3|^8.0",
-        "symfony/event-dispatcher":    "^4.3|^5.0",
-        "symfony/property-access":     "^4.3|^5.0",
-        "symfony/expression-language": "^4.3|^5.0"
+        "symfony/event-dispatcher":    "^4.3|^5.0|^6.0",
+        "symfony/property-access":     "^4.3|^5.0|^6.0",
+        "symfony/expression-language": "^4.3|^5.0|^6.0"
     },
     "suggest": {
         "twig/twig": "Access the state machine in your twig templates (^2.10|^3.0)"
     },
     "require-dev": {
-        "phpspec/phpspec": "^5.0|^6.0",
+        "phpspec/phpspec": "^5.0|^6.0|^7.1",
         "twig/twig": "^2.10|^3.0"
     },
     "autoload": {