diff --git a/README.md b/README.md
index dd356b5f..e97de711 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,16 @@
 # rCore-Tutorial-v3
-rCore-Tutorial version 3.
\ No newline at end of file
+rCore-Tutorial version 3.x
+
+## Dependency
+
+### Binaries
+
+* rustc 1.56.0-nightly (08095fc1f 2021-07-26)
+
+* qemu: 5.0.0
+
+* rustsbi-lib: 0.2.0-alpha.4
+
+  rustsbi-qemu: d4968dd2
+
+  rustsbi-k210: b689314e
diff --git a/rust-toolchain b/rust-toolchain
index 2c78ef84..bf867e0a 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2021-07-15
+nightly