diff --git a/tests/psalm-baseline.xml b/tests/psalm-baseline.xml
index f8ab41ada..dd6781572 100644
--- a/tests/psalm-baseline.xml
+++ b/tests/psalm-baseline.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="4.3.1@2feba22a005a18bf31d4c7b9bdb9252c73897476">
+<files psalm-version="4.4.1@9fd7a7d885b3a216cff8dec9d8c21a132f275224">
   <file src="lib/Activity/ActivityManager.php">
     <TypeDoesNotContainType occurrences="1">
       <code>$message !== null</code>
@@ -82,8 +82,7 @@
     </UndefinedClass>
   </file>
   <file src="lib/DAV/CalendarObject.php">
-    <UndefinedClass occurrences="2">
-      <code>IACL</code>
+    <UndefinedClass occurrences="1">
       <code>ICalendarObject</code>
     </UndefinedClass>
   </file>