diff --git a/.github/workflows/phpcs.yml b/.github/workflows/phpcs.yml
index e8e39b7d6..41d2e1168 100644
--- a/.github/workflows/phpcs.yml
+++ b/.github/workflows/phpcs.yml
@@ -42,4 +42,4 @@ jobs:
         run: composer install --no-interaction --prefer-dist
 
       - name: Check codestyle
-        run: ./vendor/bin/phpcs --standard=PEAR src/
+        run: ./vendor/bin/phpcs
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 000000000..d811e90a7
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<ruleset name="JsonMapper"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="phpcs.xsd">
+
+    <rule ref="PEAR"/>
+    <rule ref="Generic.Files.LineLength">
+        <properties>
+            <property name="lineLimit" value="100"/>
+        </properties>
+    </rule>
+
+    <file>src/</file>
+</ruleset>