diff --git a/lake-manifest.json b/lake-manifest.json
index f1344de..b4314fd 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -5,7 +5,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover",
-   "rev": "b66b1cd7b8819db6059bc3d6093b22b0a380e793",
+   "rev": "8554815c2dc6b7abe99ec1f08849c9759ba77947",
    "name": "lean4export",
    "manifestFile": "lake-manifest.json",
    "inputRev": "master",
diff --git a/lean-toolchain b/lean-toolchain
index e6a8c3c..18640c8 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.31.0-rc2
+leanprover/lean4:v4.31.0