diff --git a/.gitignore b/.gitignore
index d3ce4ec3..88763fdb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 /composer.lock
 /vendor/
 phpunit.xml
+.phpunit.result.cache
 .phpcs.xml
 phpcs.xml
 tags
diff --git a/composer.circleci.json b/composer.circleci.json
index fcc9e722..95d3b80d 100644
--- a/composer.circleci.json
+++ b/composer.circleci.json
@@ -35,7 +35,7 @@
         "php" : ">=5.6.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.0 || ^6.5",
+        "phpunit/phpunit": "^5.0 || ^6.5 || ^7.0 || ^8.0",
         "squizlabs/php_codesniffer": "^3.1"
     }
 }
diff --git a/composer.json b/composer.json
index 4b3d7bd7..af633725 100644
--- a/composer.json
+++ b/composer.json
@@ -39,9 +39,9 @@
     },
     "require-dev": {
         "dealerdirect/phpcodesniffer-composer-installer": "^0.4.4 || ^0.5 || ^0.6",
-        "phpunit/phpunit": "^5.0 || ^6.5",
+        "phpunit/phpunit": "^5.0 || ^6.5 || ^7.0 || ^8.0",
         "sirbrillig/phpcs-import-detection": "^1.1",
-        "limedeck/phpunit-detailed-printer": "^3.1",
+        "limedeck/phpunit-detailed-printer": "^3.1 || ^4.0 || ^5.0",
         "phpstan/phpstan": "^0.11.8"
     }
 }