diff --git a/.arclint b/.arclint
new file mode 100644
index 0000000..b380f64
--- /dev/null
+++ b/.arclint
@@ -0,0 +1,14 @@
+{
+  "linters": {
+    "php": {
+      "type": "php",
+      "include": "(\\.(php|phtml)$)"
+    },
+    "phpcs": {
+      "type": "phpcs",
+      "bin": "phpcs",
+      "include": "(\\.(php|phtml)$)",
+      "phpcs.standard": "phpcs.xml"
+    }
+  }
+}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index da3ad0a..e8506c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 ### Changed
 
 - Removed orphaned files from the previous deletion of Netzarbeiter/Customer-Activation, hard coded in the repo. @jhoelzl
+- (Dev): Added lints
 
 ### Notes
 
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..9f25d0b
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0"?>
+<ruleset name="SitewardsStandard">
+    <description>Sitewards coding standards.</description>
+
+    <ini name="date.timezone" value="Europe/Berlin" />
+
+    <rule ref="PSR2" />
+
+    <rule ref="PSR1.Classes.ClassDeclaration">
+        <exclude-pattern>*app/code*</exclude-pattern>
+        <exclude-pattern>*SitewardsStandard*</exclude-pattern>
+    </rule>
+
+    <rule ref="Squiz.Classes.ValidClassName">
+        <exclude-pattern>*app/code*</exclude-pattern>
+        <exclude-pattern>*SitewardsStandard*</exclude-pattern>
+    </rule>
+
+    <rule ref="PSR2.Methods.MethodDeclaration.Underscore">
+        <exclude-pattern>*app/code*</exclude-pattern>
+        <exclude-pattern>*SitewardsStandard*</exclude-pattern>
+    </rule>
+
+    <!-- Ensure multiple statements that are sequential are aligned -->
+    <rule ref="Generic.Formatting.MultipleStatementAlignment"/>
+
+    <!-- Ensure there is no superfleus whitespace -->
+    <rule ref="Squiz.WhiteSpace.SuperfluousWhitespace" />
+</ruleset>