diff --git a/Makefile b/Makefile
index e0ed1f5..86fffd1 100644
--- a/Makefile
+++ b/Makefile
@@ -20,24 +20,16 @@ phpstan: vendor
 phpstan-baseline: vendor                                                        ## run phpstan static code analyser
 	vendor/bin/phpstan analyse --generate-baseline
 
-.PHONY: psalm
-psalm: vendor                                                                   ## run psalm static code analyser
-	vendor/bin/psalm
-
-.PHONY: psalm-baseline
-psalm-baseline: vendor                                                          ## run psalm static code analyser
-	vendor/bin/psalm --update-baseline --set-baseline=baseline.xml
-
 .PHONY: phpunit
 phpunit: vendor                                                                 ## run phpunit tests
 	XDEBUG_MODE=coverage vendor/bin/phpunit
 
 .PHONY: infection
 infection: vendor                                                               ## run infection
-	XDEBUG_MODE=coverage vendor/bin/infection --threads=max
+	XDEBUG_MODE=coverage vendor/bin/infection --threads=7
 
 .PHONY: static
-static: psalm phpstan phpcs-check                                               ## run static analyser
+static: phpstan cs                                               ## run static analyser
 
 test: phpunit                                                                   ## run tests
 
diff --git a/baseline.xml b/baseline.xml
deleted file mode 100644
index 93a8381..0000000
--- a/baseline.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="5.21.1@8c473e2437be8b6a8fd8f630f0f11a16b114c494">
-  <file src="src/DefaultWorker.php">
-    <TypeDoesNotContainType>
-      <code><![CDATA[$this->shouldStop]]></code>
-      <code><![CDATA[$this->shouldStop]]></code>
-    </TypeDoesNotContainType>
-  </file>
-</files>
diff --git a/psalm.xml b/psalm.xml
deleted file mode 100644
index a0ff8ee..0000000
--- a/psalm.xml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0"?>
-<psalm
-        errorLevel="1"
-        resolveFromConfigFile="true"
-        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xmlns="https://getpsalm.org/schema/config"
-        xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
-        errorBaseline="baseline.xml"
-        findUnusedBaselineEntry="true"
-        findUnusedCode="false"
->
-    <projectFiles>
-        <directory name="src"/>
-        <directory name="tests"/>
-        <ignoreFiles>
-            <directory name="vendor"/>
-        </ignoreFiles>
-    </projectFiles>
-
-    <plugins>
-        <pluginClass class="Psalm\PhpUnitPlugin\Plugin"/>
-    </plugins>
-</psalm>