diff --git a/lean-toolchain b/lean-toolchain
index fe8c08a7..426033e8 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2025-07-10
\ No newline at end of file
+leanprover/lean4:nightly-2025-08-02