diff --git a/lake-manifest.json b/lake-manifest.json
index a2d2e3b..e0184dd 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -15,7 +15,7 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "021e272cb5cdcc82b7e1e760fe915ff2f64169ad",
+   "rev": "9c6c2d647e57b2b7a0b42dd8080c698bd33a1b6f",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
diff --git a/lean-toolchain b/lean-toolchain
index 64981ae..5a9c76d 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.11.0-rc1
+leanprover/lean4:v4.11.0