diff --git a/build-compiler-rt.sh b/build-compiler-rt.sh
index 7b018c1..25db9b3 100755
--- a/build-compiler-rt.sh
+++ b/build-compiler-rt.sh
@@ -28,7 +28,7 @@ cd compiler-rt
 
 if [ -n "$SYNC" ] || [ -n "$CHECKOUT" ]; then
     [ -z "$SYNC" ] || git fetch
-    git checkout a22026054ba1a9befadef306c3f56481b4397ab3
+    git checkout 3a468fa7bb7cc79eca0320230b4201e84a43c1e6
 fi
 
 for arch in $ARCHS; do
diff --git a/build-libcxx.sh b/build-libcxx.sh
index b84e7d2..d4a6b11 100755
--- a/build-libcxx.sh
+++ b/build-libcxx.sh
@@ -27,19 +27,19 @@ fi
 if [ -n "$SYNC" ] || [ -n "$CHECKOUT_LIBUNWIND" ]; then
     cd libunwind
     [ -z "$SYNC" ] || git fetch
-    git checkout 940b92a8d45f2a24c7f94524ce136f0c1c1c5043
+    git checkout 18823fe08616e7d4fdbca7d32b6da840fac05861
     cd ..
 fi
 if [ -n "$SYNC" ] || [ -n "$CHECKOUT_LIBCXXABI" ]; then
     cd libcxxabi
     [ -z "$SYNC" ] || git fetch
-    git checkout 60abed6914ca441063e1061a02b092b2676afe6c
+    git checkout 1839f48cee24173f2cc06120778b2920dd2b257a
     cd ..
 fi
 if [ -n "$SYNC" ] || [ -n "$CHECKOUT_LIBCXX" ]; then
     cd libcxx
     [ -z "$SYNC" ] || git fetch
-    git checkout 7ef8270ddac1d8eb91647b9abd5e1cfc9d5a48ec
+    git checkout e25adff05a0c53f92f0ca353a97f14ac90111a88
     cd ..
 fi