diff --git a/lean-toolchain b/lean-toolchain
index 728ce7a44..72727f16b 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2026-07-22
+leanprover/lean4-pr-releases:pr-release-14316-50eb538