diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc25e70..00ebc1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [7.4]
+        php: [7.4, 8.0]
     steps:
     - uses: actions/checkout@v1
     - name: Install dependencies
diff --git a/composer.json b/composer.json
index 99918cc..1d5e393 100644
--- a/composer.json
+++ b/composer.json
@@ -22,8 +22,8 @@
 	},
 	"require-dev":
 	{
-		"phpunit/phpunit": "9.2",
-		"vimeo/psalm": "^3.12"
+		"phpunit/phpunit": "^9.5",
+		"vimeo/psalm": "^4.7"
 	},
 	"autoload":
 	{