diff --git a/.gitattributes b/.gitattributes
index b640645..6efd058 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,3 +4,4 @@
 .travis.yml export-ignore
 build.xml export-ignore
 phpunit.xml.dist export-ignore
+phpcs.xml.dist export-ignore
diff --git a/.gitignore b/.gitignore
index 50f8d9e..a154d47 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@ build
 vendor
 composer.lock
 phpunit.xml
+.phpcs.xml
+phpcs.xml
diff --git a/build.xml b/build.xml
index 9d95c2e..4f30c31 100644
--- a/build.xml
+++ b/build.xml
@@ -52,12 +52,10 @@
     <target name="phpcs" depends="prepare" description="Check PHP code style">
         <delete file="${basedir}/build/logs/checkstyle.xml" quiet="true" />
 
-        <exec executable="${phpcs}">
-            <arg line='--extensions=php' />
-            <arg line='--standard="${basedir}/vendor/php-parallel-lint/php-code-style/ruleset.xml"' />
+        <exec executable="${phpcs}" failonerror="true">
             <arg line='--report-checkstyle="${basedir}/build/logs/checkstyle.xml"' />
             <arg line='--report-full' />
-            <arg line='"${basedir}/src"' />
+            <arg line='--runtime-set ignore_warnings_on_exit 1' />
         </exec>
     </target>
 
diff --git a/composer.json b/composer.json
index f65682e..83b9785 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         "phpunit/phpunit": "^4.8.36 || ^5.0 || ^6.0 || ^7.0",
         "php-parallel-lint/php-parallel-lint": "^1.0",
         "php-parallel-lint/php-var-dump-check": "0.*",
-        "squizlabs/php_codesniffer": "1.*",
+        "squizlabs/php_codesniffer": "3.*",
         "php-parallel-lint/php-code-style": "1.0"
     },
     "replace": {
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
new file mode 100644
index 0000000..eec5d27
--- /dev/null
+++ b/phpcs.xml.dist
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<ruleset name="Jakub Onderka Coding Standard">
+    <description>A coding standard for Jakub Onderka's projects.</description>
+
+    <file>./src/</file>
+
+    <!-- Only check PHP files. -->
+    <arg name="extensions" value="php"/>
+
+    <!-- Show progress, show the error codes for each message (source). -->
+    <arg value="ps"/>
+
+    <!-- Strip the filepaths down to the relevant bit. -->
+    <arg name="basepath" value="./"/>
+
+    <rule ref="./vendor/php-parallel-lint/php-code-style/ruleset.xml"/>
+
+</ruleset>