diff --git a/.gitignore b/.gitignore
index 57872d0..420fb40 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /vendor/
+var/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee6b5ee..e14fcbc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Dependencies conflicts with core
 - Internal server error when generating appliance asset pdf
+- CI: fix Psalm cache directory, declare a unique composer autoloader suffix
 
 ## [4.1.5] - 2026-09-01
 
diff --git a/composer.json b/composer.json
index 96870a6..60790ca 100644
--- a/composer.json
+++ b/composer.json
@@ -10,6 +10,7 @@
     },
     "config": {
         "optimize-autoloader": true,
+        "autoloader-suffix": "PluginPdf",
         "platform": {
             "php": "8.2.99"
         },
diff --git a/psalm.xml b/psalm.xml
index 1095c55..bea84c0 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0"?>
 <psalm
     runTaintAnalysis="true"
+    cacheDirectory="var/psalm"
 >
     <projectFiles>
         <directory name="front" />