diff --git a/lib/govuk_app_config/govuk_error/configuration.rb b/lib/govuk_app_config/govuk_error/configuration.rb
index 6224b96..be4d5d5 100644
--- a/lib/govuk_app_config/govuk_error/configuration.rb
+++ b/lib/govuk_app_config/govuk_error/configuration.rb
@@ -45,6 +45,7 @@ def set_up_defaults
         "Sinatra::NotFound",
         "Slimmer::IntermittentRetrievalError",
         "Sidekiq::JobRetry::Skip",
+        "SignalException",
       ]
 
       # This will exclude exceptions that are triggered by one of the ignored