diff --git a/src/doc/rustc-dev-guide/rust-version b/src/doc/rustc-dev-guide/rust-version
index ce9f984e637b..b631041b6bfa 100644
--- a/src/doc/rustc-dev-guide/rust-version
+++ b/src/doc/rustc-dev-guide/rust-version
@@ -1 +1 @@
-efd420c770bb179537c01063e98cb6990c439654
+2b5e239c6b86cde974b0ef0f8e23754fb08ff3c5