diff --git a/kernel-ewasm/rust-toolchain b/kernel-ewasm/rust-toolchain
index 71b64c1..bc0fd71 100644
--- a/kernel-ewasm/rust-toolchain
+++ b/kernel-ewasm/rust-toolchain
@@ -1 +1 @@
-nightly-2019-03-05
\ No newline at end of file
+nightly-2019-01-01