diff --git a/os/Makefile b/os/Makefile
index 864a4e43..e3434de3 100644
--- a/os/Makefile
+++ b/os/Makefile
@@ -43,7 +43,7 @@ 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/os/src/fs/inode.rs b/os/src/fs/inode.rs
index f03225b6..8e644066 100644
--- a/os/src/fs/inode.rs
+++ b/os/src/fs/inode.rs
@@ -65,7 +65,7 @@ pub fn list_apps() {
     for app in ROOT_INODE.ls() {
         println!("{}", app);
     }
-    println!("**************/")
+    println!("**************/");
 }
 
 bitflags! {
@@ -156,4 +156,4 @@ impl File for OSInode {
         }
         total_write_size
     }
-}
\ No newline at end of file
+}
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