diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..12bc4cd
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: mnapoli # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
diff --git a/.gitignore b/.gitignore
index c9587d2..ae622c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /composer.phar
 /composer.lock
 /demo
+.phpunit.result.cache
diff --git a/composer.json b/composer.json
index cbd22aa..cf8d9be 100644
--- a/composer.json
+++ b/composer.json
@@ -15,14 +15,19 @@
         }
     },
     "require": {
-        "php": "^7.2",
+        "php": ">=7.2",
         "ext-json": "*",
-        "psr/log": "^1.1"
+        "psr/log": "^1.1 | ^2.0 | ^3.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.0",
-        "mnapoli/hard-mode": "^0.1.1",
+        "phpunit/phpunit": "^9.5",
+        "mnapoli/hard-mode": "^0.3.0",
         "mnapoli/pretty": "^1.0",
-        "phpstan/phpstan": "^0.11.2"
+        "phpstan/phpstan": "^1.0"
+    },
+    "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": false
+        }
     }
 }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 8b3119c..d50c461 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,17 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
-<phpunit colors="true"
-         bootstrap="./vendor/autoload.php">
-
-    <testsuites>
-        <testsuite name="Test suite">
-            <directory>./tests/</directory>
-        </testsuite>
-    </testsuites>
-
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">src</directory>
-        </whitelist>
-    </filter>
-
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" bootstrap="./vendor/autoload.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="Test suite">
+      <directory>./tests/</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>
diff --git a/tests/StderrLoggerTest.php b/tests/StderrLoggerTest.php
index 4555b70..eb3ff8a 100644
--- a/tests/StderrLoggerTest.php
+++ b/tests/StderrLoggerTest.php
@@ -43,7 +43,7 @@ public function test log messages to stderr()
 [EMERGENCY] Emergency
 
 LOGS
-);
+        );
     }
 
     public function test logs above the configured log level()