diff --git a/tools/psalm/psalm-baseline.xml b/tools/psalm/psalm-baseline.xml
index bd4a1a5..7d1bc76 100644
--- a/tools/psalm/psalm-baseline.xml
+++ b/tools/psalm/psalm-baseline.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="dev-master@2fef68c19f95b47e85ee80627fbb27f98f5a3d83">
+<files psalm-version="4.9.1@7e137f5b95f7394607f5d0631172ff4c2da46781">
   <file src="../../src/Psl/Math/mean.php">
     <InvalidOperand occurrences="2">
       <code>$mean += $number / $count</code>
@@ -11,6 +11,11 @@
       <code>$result += $number</code>
     </InvalidOperand>
   </file>
+  <file src="../../src/Psl/Password/hash.php">
+    <UnnecessaryVarAnnotation occurrences="1">
+      <code>false|string</code>
+    </UnnecessaryVarAnnotation>
+  </file>
   <file src="../../src/Psl/Regex/replace_with.php">
     <MixedArgumentTypeCoercion occurrences="1">
       <code>$callback</code>