diff --git a/lean-toolchain b/lean-toolchain
index 32c5976f75e24..041252de6ebf0 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2024-01-26
+leanprover/lean4:nightly-2024-01-27