diff --git a/composer.json b/composer.json
index 2bf7de98..5e6ebc8f 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     },
     "require-dev": {
         "composer/composer": "^2.8.5",
-        "phpunit/phpunit": "^9.6.21"
+        "phpunit/phpunit": "^12.0.0"
     },
     "extra": {
         "class": [
diff --git a/drainpipe-dev/composer.json b/drainpipe-dev/composer.json
index 99cbb482..a611362d 100644
--- a/drainpipe-dev/composer.json
+++ b/drainpipe-dev/composer.json
@@ -23,7 +23,7 @@
         "mockery/mockery": "^1.6.12",
         "phpspec/prophecy-phpunit": "^2",
         "phpstan/phpstan-deprecation-rules": "^2.0.1",
-        "phpunit/phpunit": "^9|^10",
+        "phpunit/phpunit": "12.0.0",
         "symfony/phpunit-bridge": "^6|^7",
         "symfony/yaml": "^6|^7",
         "tijsverkoyen/convert-to-junit-xml": "^1.11.0",