diff -u b/core/core.services.yml b/core/core.services.yml
--- b/core/core.services.yml
+++ b/core/core.services.yml
@@ -1,4 +1,5 @@
 parameters:
+  header_value_size_limit: -1
   session.storage.options: {}
   twig.config: {}
   renderer.config: