diff --git a/src/tools/miri/rust-version b/src/tools/miri/rust-version
index b084e135801..458bba9a616 100644
--- a/src/tools/miri/rust-version
+++ b/src/tools/miri/rust-version
@@ -1 +1 @@
-2d08657901d8fec8f51f203dc8a38e25c162e834
+42ca6e4e5760a548a6fa858482de6d237f6fb3b8