diff --git a/lean-toolchain b/lean-toolchain
index 565b8027fa..4dc6a62fc1 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2024-12-12
+leanprover/lean4-pr-releases:pr-release-6403