diff --git a/StanHeaders/inst/include/upstream b/StanHeaders/inst/include/upstream
index 1c85085b5..db36a6585 160000
--- a/StanHeaders/inst/include/upstream
+++ b/StanHeaders/inst/include/upstream
@@ -1 +1 @@
-Subproject commit 1c85085b596bca920f1a1fd216e6dcb1b4bd6974
+Subproject commit db36a6585a06fad5b4c4386579a5bbce7735e35f