diff --git a/backend/rust-toolchain b/backend/rust-toolchain
new file mode 100644
index 000000000000..011b8eae6cec
--- /dev/null
+++ b/backend/rust-toolchain
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly-2021-04-24"
diff --git a/frontend/rust-lib/flowy-document/src/lib.rs b/frontend/rust-lib/flowy-document/src/lib.rs
index def8347dcb77..c3ffb87b3ded 100644
--- a/frontend/rust-lib/flowy-document/src/lib.rs
+++ b/frontend/rust-lib/flowy-document/src/lib.rs
@@ -1,5 +1,3 @@
-#![feature(vecdeque_binary_search)]
-
 pub mod errors;
 pub mod module;
 mod notify;