diff --git a/contrib/libcxx b/contrib/libcxx
index a8c45330087..1374d69e380 160000
--- a/contrib/libcxx
+++ b/contrib/libcxx
@@ -1 +1 @@
-Subproject commit a8c453300879d0bf255f9d5959d42e2c8aac1bfb
+Subproject commit 1374d69e380be9bf06a0e7e1c6fcbc7158aa7496
diff --git a/contrib/libcxxabi b/contrib/libcxxabi
index 7aacd45028e..1ebc83af4c0 160000
--- a/contrib/libcxxabi
+++ b/contrib/libcxxabi
@@ -1 +1 @@
-Subproject commit 7aacd45028ecf5f1c39985ecbd4f67eed9b11ce5
+Subproject commit 1ebc83af4c06dbcd56b4d166c1314a7d4c1173f9