diff --git a/lib/stan_math b/lib/stan_math
index 0956b106f01..818be4ae86a 160000
--- a/lib/stan_math
+++ b/lib/stan_math
@@ -1 +1 @@
-Subproject commit 0956b106f01187a59d32dee8a7822a6a720777e1
+Subproject commit 818be4ae86ae91af53943dc742ce977102bd1689