diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 8694d2d..e34190e 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -29,4 +29,12 @@ jobs:
       os: >-
         ['ubuntu-latest']
       php: >-
-        ['8.0', '8.1', '8.2', '8.3']
+        ['8.1', '8.2', '8.3']
+  psalm80:
+    uses: yiisoft/actions/.github/workflows/psalm.yml@master
+    with:
+      psalm-config: psalm80.xml
+      os: >-
+        ['ubuntu-latest']
+      php: >-
+        ['8.0']
diff --git a/composer.json b/composer.json
index 61129eb..f5e7df7 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
         "rector/rector": "^0.19.0",
         "roave/infection-static-analysis-plugin": "^1.25",
         "spatie/phpunit-watcher": "^1.23",
-        "vimeo/psalm": "^4.30|^5.4"
+        "vimeo/psalm": "^4.30|^5.20"
     },
     "autoload": {
         "psr-4": {
diff --git a/psalm.xml b/psalm.xml
index 7f490cc..6bf6e11 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -15,5 +15,6 @@
     </projectFiles>
     <issueHandlers>
         <MixedAssignment errorLevel="suppress" />
+        <RiskyTruthyFalsyComparison errorLevel="suppress" />
     </issueHandlers>
 </psalm>
diff --git a/psalm80.xml b/psalm80.xml
new file mode 100644
index 0000000..7f490cc
--- /dev/null
+++ b/psalm80.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="1"
+    findUnusedBaselineEntry="true"
+    findUnusedCode="false"
+    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"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor"/>
+        </ignoreFiles>
+    </projectFiles>
+    <issueHandlers>
+        <MixedAssignment errorLevel="suppress" />
+    </issueHandlers>
+</psalm>