symfony
diff --git a/‎components/http_foundation.rst
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+1Lines changed: 1 addition & 0 deletions b/‎components/http_foundation.rst
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+1Lines changed: 1 addition & 0 deletions
@@ -465,6 +465,7 @@ call::
         's_maxage'      => 600,
         'private'       => false,
         'public'        => true,
+        'immutable'     => true,
     ]);
 
 To check if the Response validators (``ETag``, ``Last-Modified``) match a