diff --git a/lean-toolchain b/lean-toolchain
index 2e82a844a67945..af93dff0a8bf4b 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2026-05-12
+leanprover/lean4:nightly-2026-05-13