diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 8311e74..716b580 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -39,4 +39,4 @@ jobs:
 
       - name: PHP CodeSniffer
         if: success() || matrix.allow_failure
-        run: phpcs
+        run: phpcs -wps --colors
diff --git a/.phpcs.xml b/.phpcs.xml
deleted file mode 100644
index d1d0ed7..0000000
--- a/.phpcs.xml
+++ /dev/null
@@ -1,25 +0,0 @@
-<?xml version="1.0"?>
-<ruleset name="PHP_CodeSniffer">
-    <description>Sniff our code a while</description>
-
-    <file>./</file>
-
-    <exclude-pattern>vendor/*</exclude-pattern>
-
-    <arg value="wps"/>
-    <arg name="report-width" value="auto"/>
-    <arg name="report-full"/>
-    <arg name="report-gitblame"/>
-    <arg name="report-summary"/>
-    <arg name="encoding" value="UTF-8"/>
-    <arg name="extensions" value="php"/>
-
-    <rule ref="PSR2"/>
-
-    <rule ref="Generic.Files.LineLength">
-        <properties>
-            <property name="lineLimit" value="120"/>
-            <property name="absoluteLineLimit" value="0"/>
-        </properties>
-    </rule>
-</ruleset>
diff --git a/application/clicommands/Icinga2Command.php b/application/clicommands/Icinga2Command.php
index 3ae1335..816e063 100644
--- a/application/clicommands/Icinga2Command.php
+++ b/application/clicommands/Icinga2Command.php
@@ -1,4 +1,5 @@
 <?php
+
 /* Icinga Web 2 | (c) 2018 Icinga Development Team | GPLv2+ */
 
 namespace Icinga\Module\Graphite\Clicommands;
@@ -124,11 +125,13 @@ EOT
                     $macros['service_name_template'] = [''];
 
                     foreach ($this->cartesianProduct($macros) as $macroValues) {
-                        if (preg_match(
-                            '/\A\.[^.]+\.(.+)\.[^.]+\z/',
-                            $metricFilter->resolve($macroValues),
-                            $match
-                        )) {
+                        if (
+                            preg_match(
+                                '/\A\.[^.]+\.(.+)\.[^.]+\z/',
+                                $metricFilter->resolve($macroValues),
+                                $match
+                            )
+                        ) {
                             $perfdata[$match[1]] = $max;
                         }
                     }
diff --git a/application/forms/TimeRangePicker/CommonForm.php b/application/forms/TimeRangePicker/CommonForm.php
index 395ebe0..21e2096 100644
--- a/application/forms/TimeRangePicker/CommonForm.php
+++ b/application/forms/TimeRangePicker/CommonForm.php
@@ -145,10 +145,13 @@ class CommonForm extends Form
         $params = $this->getRedirectUrl()->getParams();
         $seconds = TimeRangePickerTools::getRelativeSeconds($params);
 
-        if ($seconds === null && count(array_intersect_key(
-            $params->toArray(false),
-            array_keys(TimeRangePickerTools::getAllRangeParameters())
-        )) === 0) {
+        if (
+            $seconds === null
+            && count(array_intersect_key(
+                $params->toArray(false),
+                array_keys(TimeRangePickerTools::getAllRangeParameters())
+            )) === 0
+        ) {
             $seconds = TimeRangePickerTools::getDefaultRelativeTimeRange();
         }
 
diff --git a/library/Graphite/Graphing/Template.php b/library/Graphite/Graphing/Template.php
index aaf967e..a030fb7 100644
--- a/library/Graphite/Graphing/Template.php
+++ b/library/Graphite/Graphing/Template.php
@@ -134,7 +134,8 @@ class Template
                         if (! isset($handledCurves[$curveName2])) {
                             foreach ($metrics1 as $metric1 => & $vars1) {
                                 foreach ($metrics2 as $metric2 => & $vars2) {
-                                    if (count(array_intersect_assoc($vars1, $vars2))
+                                    if (
+                                        count(array_intersect_assoc($vars1, $vars2))
                                         === count(array_intersect_key($vars1, $vars2))
                                     ) {
                                         $possibleCombinations[$curveName1][$curveName2][$metric1][$metric2] = true;
diff --git a/library/Graphite/Graphing/Templates.php b/library/Graphite/Graphing/Templates.php
index 12e189b..0765e46 100644
--- a/library/Graphite/Graphing/Templates.php
+++ b/library/Graphite/Graphing/Templates.php
@@ -71,14 +71,16 @@ class Templates
      */
     public function loadDir($path)
     {
-        foreach (new RecursiveIteratorIterator(
-            new RecursiveDirectoryIterator(
-                $path,
-                RecursiveDirectoryIterator::KEY_AS_PATHNAME | RecursiveDirectoryIterator::CURRENT_AS_FILEINFO
+        foreach (
+            new RecursiveIteratorIterator(
+                new RecursiveDirectoryIterator(
+                    $path,
+                    RecursiveDirectoryIterator::KEY_AS_PATHNAME | RecursiveDirectoryIterator::CURRENT_AS_FILEINFO
                     | RecursiveDirectoryIterator::SKIP_DOTS | RecursiveDirectoryIterator::FOLLOW_SYMLINKS
-            ),
-            RecursiveIteratorIterator::LEAVES_ONLY
-        ) as $filepath => $fileinfo) {
+                ),
+                RecursiveIteratorIterator::LEAVES_ONLY
+            ) as $filepath => $fileinfo
+        ) {
             /** @var SplFileInfo $fileinfo */
 
             if ($fileinfo->isFile() && preg_match('/\A[^.].*\.ini\z/si', $fileinfo->getFilename())) {
@@ -171,10 +173,12 @@ class Templates
                         );
                     }
 
-                    if (count(array_intersect(
-                        $curves[$curve][0]->getMacros(),
-                        ['host_name_template', 'service_name_template']
-                    )) !== 1) {
+                    if (
+                        count(array_intersect(
+                            $curves[$curve][0]->getMacros(),
+                            ['host_name_template', 'service_name_template']
+                        )) !== 1
+                    ) {
                         throw new ConfigurationError(
                             'Bad metrics filter "%s" for curve "%s" of template "%s" in file "%s": must include'
                             . ' either the macro $host_name_template$ or $service_name_template$, but not both',
diff --git a/library/Graphite/ProvidedHook/Icingadb/IcingadbSupport.php b/library/Graphite/ProvidedHook/Icingadb/IcingadbSupport.php
index a4522d4..8f0f38e 100644
--- a/library/Graphite/ProvidedHook/Icingadb/IcingadbSupport.php
+++ b/library/Graphite/ProvidedHook/Icingadb/IcingadbSupport.php
@@ -6,5 +6,4 @@ use Icinga\Module\Icingadb\Hook\IcingadbSupportHook;
 
 class IcingadbSupport extends IcingadbSupportHook
 {
-
 }
diff --git a/library/Graphite/ProvidedHook/Icingadb/ServiceDetailExtension.php b/library/Graphite/ProvidedHook/Icingadb/ServiceDetailExtension.php
index 3e79430..63c2b79 100644
--- a/library/Graphite/ProvidedHook/Icingadb/ServiceDetailExtension.php
+++ b/library/Graphite/ProvidedHook/Icingadb/ServiceDetailExtension.php
@@ -3,7 +3,6 @@
 namespace Icinga\Module\Graphite\ProvidedHook\Icingadb;
 
 use Icinga\Application\Icinga;
-
 use Icinga\Module\Graphite\Util\InternalProcessTracker as IPT;
 use Icinga\Module\Graphite\Web\Controller\TimeRangePickerTrait;
 use Icinga\Module\Graphite\Web\Widget\Graphs;
diff --git a/library/Graphite/Web/Widget/Graphs.php b/library/Graphite/Web/Widget/Graphs.php
index cdab2cf..e18b8da 100644
--- a/library/Graphite/Web/Widget/Graphs.php
+++ b/library/Graphite/Web/Widget/Graphs.php
@@ -246,10 +246,12 @@ abstract class Graphs extends AbstractWidget
         IPT::recordf("Icinga check command: %s", $this->checkCommand);
         IPT::recordf("Obscured check command: %s", $this->obscuredCheckCommand);
 
-        foreach ([
+        foreach (
+            [
             ['template', $concreteTemplates, []],
             ['default_template', $allTemplates->getDefaultTemplates(), $excludedMetrics],
-        ] as $templateSet) {
+            ] as $templateSet
+        ) {
             list($urlParam, $templates, $excludeMetrics) = $templateSet;
 
             if ($urlParam === 'template') {
diff --git a/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbHost.php b/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbHost.php
index 5ce769a..2b0a614 100644
--- a/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbHost.php
+++ b/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbHost.php
@@ -5,7 +5,7 @@ namespace Icinga\Module\Graphite\Web\Widget\Graphs\Icingadb;
 use Icinga\Module\Graphite\Graphing\Template;
 use Icinga\Module\Graphite\Web\Widget\Graphs;
 use Icinga\Web\Url;
-use \Icinga\Module\Icingadb\Model\Host;
+use Icinga\Module\Icingadb\Model\Host;
 
 class IcingadbHost extends Graphs
 {
diff --git a/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbService.php b/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbService.php
index e3da8c2..7827e86 100644
--- a/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbService.php
+++ b/library/Graphite/Web/Widget/Graphs/Icingadb/IcingadbService.php
@@ -5,7 +5,7 @@ namespace Icinga\Module\Graphite\Web\Widget\Graphs\Icingadb;
 use Icinga\Module\Graphite\Graphing\Template;
 use Icinga\Module\Graphite\Web\Widget\Graphs;
 use Icinga\Web\Url;
-use \Icinga\Module\Icingadb\Model\Service;
+use Icinga\Module\Icingadb\Model\Service;
 
 class IcingadbService extends Graphs
 {
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..37e0e27
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<ruleset name="PSR12">
+    <!-- Test all PHP files except those in vendor/ -->
+    <file>./</file>
+    <arg name="extensions" value="php"/>
+    <exclude-pattern>vendor/*</exclude-pattern>
+
+    <arg name="report-width" value="auto"/>
+    <arg name="report-full"/>
+    <arg name="report-gitblame"/>
+    <arg name="report-summary"/>
+    <arg name="encoding" value="UTF-8"/>
+
+    <rule ref="PSR12"/>
+</ruleset>