diff --git a/os/Makefile b/os/Makefile
index c79d3a61..80f4e61a 100644
--- a/os/Makefile
+++ b/os/Makefile
@@ -40,7 +40,7 @@ endif
 
 env:
 	(rustup target list | grep "riscv64gc-unknown-none-elf (installed)") || rustup target add $(TARGET)
-	cargo install cargo-binutils --vers ~0.2
+	cargo install cargo-binutils --vers =0.3.3
 	rustup component add rust-src
 	rustup component add llvm-tools-preview
 
diff --git a/rust-toolchain b/rust-toolchain
index 1c5af266..fd472758 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2021-08-25
+nightly-2021-10-15