diff --git a/bootloader/rustsbi-qemu.bin b/bootloader/rustsbi-qemu.bin
index 51cc03f4..ddbf336a 100755
Binary files a/bootloader/rustsbi-qemu.bin and b/bootloader/rustsbi-qemu.bin differ
diff --git a/rust-toolchain b/rust-toolchain
index fd472758..c9f86822 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2021-10-15
+nightly-2021-12-15