diff --git a/lake-manifest.json b/lake-manifest.json
index f0ce1ed02..c423658d7 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -5,10 +5,10 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "09f28100a1eedd6f03d1ef4c36aafb9762ee9f1d",
+   "rev": "516318b4c53a12c6db4c506b8aba14bed1239b1c",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "nightly-testing-2026-05-03",
+   "inputRev": "nightly-testing-2026-05-04",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover-community/plausible",
@@ -75,7 +75,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "953e9065fe10a846da3b85497f278311796738e2",
+   "rev": "a5057d09bbda63aed64ee5b88d37b63da3e46a09",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
    "inputRev": "nightly-testing",
diff --git a/lakefile.toml b/lakefile.toml
index f3d3257b5..f869e55b4 100644
--- a/lakefile.toml
+++ b/lakefile.toml
@@ -18,7 +18,7 @@ weak.linter.unicodeLinter = false
 [[require]]
 name = "mathlib"
 git = "https://github.com/leanprover-community/mathlib4-nightly-testing"
-rev = "nightly-testing-2026-05-03"
+rev = "nightly-testing-2026-05-04"
 
 [[lean_lib]]
 name = "Cslib"
diff --git a/lean-toolchain b/lean-toolchain
index f28bc4565..1b641f303 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2026-05-03
+leanprover/lean4:nightly-2026-05-04