diff --git a/crt/aws-c-cal b/crt/aws-c-cal
index 0a6beeb9f..b0219caef 160000
--- a/crt/aws-c-cal
+++ b/crt/aws-c-cal
@@ -1 +1 @@
-Subproject commit 0a6beeb9fd223ac0712edb6a28f9978589b30bb8
+Subproject commit b0219caef2c2261daeac20d617cbdca5e13d8d36
diff --git a/crt/aws-c-io b/crt/aws-c-io
index c4b661f44..c9cb77747 160000
--- a/crt/aws-c-io
+++ b/crt/aws-c-io
@@ -1 +1 @@
-Subproject commit c4b661f44497b18201b56ffd200cc478441f6434
+Subproject commit c9cb77747d3fd2809cf3d9c43be7d5decc17e4b3
diff --git a/crt/aws-c-mqtt b/crt/aws-c-mqtt
index 7c467e4f2..0cc50d158 160000
--- a/crt/aws-c-mqtt
+++ b/crt/aws-c-mqtt
@@ -1 +1 @@
-Subproject commit 7c467e4f242920875cf68aed60deafc54bcb177e
+Subproject commit 0cc50d1582719c9f3b55539139015fc86965bb6f
diff --git a/crt/s2n b/crt/s2n
index f7930e58e..4654fecb0 160000
--- a/crt/s2n
+++ b/crt/s2n
@@ -1 +1 @@
-Subproject commit f7930e58e730ad745063785d1d421ecc952aee00
+Subproject commit 4654fecb05cd5aacbda262654eb95a3876183698