diff --git a/src/doc/rustc-dev-guide/rust-version b/src/doc/rustc-dev-guide/rust-version
index a428bf49dfdb..97c3c27262f8 100644
--- a/src/doc/rustc-dev-guide/rust-version
+++ b/src/doc/rustc-dev-guide/rust-version
@@ -1 +1 @@
-d12e1e12ae6fb828df1b663a07c9191bc48c6d6d
+84c11900724736a2b9afac4822031d78a9ed8e86