diff --git a/lean-toolchain b/lean-toolchain
index 59b593eba..f92e16ca9 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2026-09-16
+leanprover/lean4-pr-releases:pr-release-14935-c9c2cd6