diff --git a/.github/workflows/psalm.yml b/.github/workflows/psalm.yml
index af1b85e..3812812 100644
--- a/.github/workflows/psalm.yml
+++ b/.github/workflows/psalm.yml
@@ -18,8 +18,13 @@ jobs:
         with:
           php-version: "8.3"
 
-      - name: Install composer dependencies
+      - name: Install composer dependencies (date-time)
         uses: ramsey/composer-install@v3
 
+      - name: Install composer dependencies (psalm)
+        uses: ramsey/composer-install@v3
+        with:
+          working-directory: "tools/psalm"
+
       - name: Run Psalm
-        run: vendor/bin/psalm --show-info=false --find-unused-psalm-suppress --no-progress
+        run: tools/psalm/vendor/bin/psalm --show-info=false --no-progress --config=tools/psalm/psalm.xml
diff --git a/.gitignore b/.gitignore
index 9fad048..1ba7872 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,7 @@
 /tools/rector/*
 !/tools/rector/composer.json
 !/tools/rector/rector.php
+!/tools/psalm
+/tools/psalm/*
+!/tools/psalm/composer.json
+!/tools/psalm/psalm.xml
diff --git a/README.md b/README.md
index 6979852..c23ffa5 100644
--- a/README.md
+++ b/README.md
@@ -219,10 +219,16 @@ vendor/bin/phpunit
 
 ### Static analysis
 
+Install Psalm in its own folder:
+
+```sh
+composer install --working-dir=tools/psalm
+```
+
 Run Psalm static analysis:
 
 ```sh
-vendor/bin/psalm --no-cache
+tools/psalm/vendor/bin/psalm --no-cache --config=tools/psalm/psalm.xml
 ```
 
 ### Coding Style
diff --git a/composer.json b/composer.json
index 6283b08..c5897c3 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,6 @@
     "require-dev": {
         "phpunit/phpunit": "^10.5",
         "php-coveralls/php-coveralls": "^2.2",
-        "vimeo/psalm": "5.25.0",
         "guzzlehttp/guzzle": "^7.0"
     },
     "suggest": {
diff --git a/tools/psalm/composer.json b/tools/psalm/composer.json
new file mode 100644
index 0000000..85d784e
--- /dev/null
+++ b/tools/psalm/composer.json
@@ -0,0 +1,5 @@
+{
+    "require": {
+        "vimeo/psalm": "^5.26"
+    }
+}
diff --git a/psalm.xml b/tools/psalm/psalm.xml
similarity index 93%
rename from psalm.xml
rename to tools/psalm/psalm.xml
index f19428c..0fe9541 100644
--- a/psalm.xml
+++ b/tools/psalm/psalm.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <psalm
     errorLevel="1"
-    resolveFromConfigFile="true"
+    resolveFromConfigFile="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"