diff --git a/crt/aws-c-auth b/crt/aws-c-auth
index 7d6cfb925..37ebf2d27 160000
--- a/crt/aws-c-auth
+++ b/crt/aws-c-auth
@@ -1 +1 @@
-Subproject commit 7d6cfb92530e12109560988abec72c8ac9817281
+Subproject commit 37ebf2d27cf44386c7f194221c3e03992fcb4c8d
diff --git a/crt/aws-c-event-stream b/crt/aws-c-event-stream
index 31a44ff91..acc869ecb 160000
--- a/crt/aws-c-event-stream
+++ b/crt/aws-c-event-stream
@@ -1 +1 @@
-Subproject commit 31a44ff9108840a8f3fec54006218f4bc6c505e1
+Subproject commit acc869ecbafad139f9ef07ded0c74045910edfc8
diff --git a/crt/aws-c-io b/crt/aws-c-io
index 9cf142c08..4c48e60df 160000
--- a/crt/aws-c-io
+++ b/crt/aws-c-io
@@ -1 +1 @@
-Subproject commit 9cf142c08c28d5b1195aae09d2c05a6d17502e09
+Subproject commit 4c48e60df22214cdf8f2ed50214ea0a58cadabc3
diff --git a/crt/s2n b/crt/s2n
index bcb3f283f..f6ca8f094 160000
--- a/crt/s2n
+++ b/crt/s2n
@@ -1 +1 @@
-Subproject commit bcb3f283faf030265ece9a16174b52ca822c5570
+Subproject commit f6ca8f0941851af4a05739c4a4b426970e953317