diff --git a/lake-manifest.json b/lake-manifest.json
index f18b8d0..0d42444 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -5,10 +5,10 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "4488d40d070b9700d4d5a6aa342f0d40c31b2a2d",
+   "rev": "f2effa3d803fda822b1f97b806c47cf2adfbcbc2",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.33.0",
+   "inputRev": "v4.34.0",
    "inherited": false,
    "configFile": "lakefile.toml"}],
  "name": "lean4lean",
diff --git a/lakefile.toml b/lakefile.toml
index c0d82fe..d7a4f38 100644
--- a/lakefile.toml
+++ b/lakefile.toml
@@ -4,7 +4,7 @@ defaultTargets = ["Lean4Lean", "lean4lean", "Lean4Lean.Theory", "Lean4Lean.Verif
 [[require]]
 name = "batteries"
 git = "https://github.com/leanprover-community/batteries"
-rev = "v4.33.0"
+rev = "v4.34.0"
 
 [[lean_lib]]
 name = "Lean4Lean"
diff --git a/lean-toolchain b/lean-toolchain
index a8afa7d..12359f9 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.33.1
+leanprover/lean4:v4.34.0