diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5d45d7a99..e1321c265 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,11 +69,15 @@ jobs:
           - clang-9
           - clang-10
           - clang-11
+          - clang-12
           - gcc-4.8
           - gcc-5
           - gcc-6
           - gcc-7
           - gcc-8
+          - gcc-9
+          - gcc-10
+          - gcc-11
     steps:
       # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
       - name: Build ${{ env.PACKAGE_NAME }}
diff --git a/crt/aws-c-common b/crt/aws-c-common
index 15a25349d..ae7b067d9 160000
--- a/crt/aws-c-common
+++ b/crt/aws-c-common
@@ -1 +1 @@
-Subproject commit 15a25349d59852e2655c0920835644f2eb948d77
+Subproject commit ae7b067d9274d2d3faa1d3ae42d489a6986661f7
diff --git a/crt/aws-c-io b/crt/aws-c-io
index 5b89f50a8..bf2d72230 160000
--- a/crt/aws-c-io
+++ b/crt/aws-c-io
@@ -1 +1 @@
-Subproject commit 5b89f50a813271d68b8efe58f0515b480b1356c7
+Subproject commit bf2d72230727f02eddb5b16c4e6c5ac5a3f203a7
diff --git a/crt/aws-c-s3 b/crt/aws-c-s3
index 59569e317..0ce756ec2 160000
--- a/crt/aws-c-s3
+++ b/crt/aws-c-s3
@@ -1 +1 @@
-Subproject commit 59569e317a4ef84506c39b798875f4f169a796fe
+Subproject commit 0ce756ec29b251cd81f6937ccf856a3878c5edd3
diff --git a/crt/aws-lc b/crt/aws-lc
index 19d9ace40..4e690737e 160000
--- a/crt/aws-lc
+++ b/crt/aws-lc
@@ -1 +1 @@
-Subproject commit 19d9ace40f6770e062b1e9ec1d46935b300b948e
+Subproject commit 4e690737e0a386f8c5eb9a0a88becc7985b5d24e
diff --git a/crt/s2n b/crt/s2n
index 80a691335..38d769c9c 160000
--- a/crt/s2n
+++ b/crt/s2n
@@ -1 +1 @@
-Subproject commit 80a691335f6ec4846634952cb1a9bf1327e4b953
+Subproject commit 38d769c9cd079b4bbe250032acdc7fdafbfaab51