diff --git a/lake-manifest.json b/lake-manifest.json
index c239311..433105a 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -15,7 +15,7 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "fa571ea02a804b52a59e58012b1e21fe4f0514f2",
+   "rev": "4756e0fc48acce0cc808df0ad149de5973240df6",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
diff --git a/lean-toolchain b/lean-toolchain
index 80136fc..beeaa69 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.12.0-rc1
\ No newline at end of file
+leanprover/lean4:v4.12.0
\ No newline at end of file