diff --git a/src/rust-harfbuzz b/src/rust-harfbuzz
index 80272a985fd..5c0def8dadc 160000
--- a/src/rust-harfbuzz
+++ b/src/rust-harfbuzz
@@ -1 +1 @@
-Subproject commit 80272a985fd3ec3cd6430402e25551096eb43722
+Subproject commit 5c0def8dadcde1d4bea1f532067f6505ac893a2c
diff --git a/src/rust-mozjs b/src/rust-mozjs
index 4659a8cddcb..54959a6f2c0 160000
--- a/src/rust-mozjs
+++ b/src/rust-mozjs
@@ -1 +1 @@
-Subproject commit 4659a8cddcb34520f1dbc46d236e03bad8e75e46
+Subproject commit 54959a6f2c0136a2dc53732c88d3da8ac36a5f83