diff --git a/lean-toolchain b/lean-toolchain
index cf25a98..d0eb99f 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.15.0-rc1
+leanprover/lean4:v4.15.0
diff --git a/test/Mathlib/lake-manifest.json b/test/Mathlib/lake-manifest.json
index 60686a2..ddd07cb 100644
--- a/test/Mathlib/lake-manifest.json
+++ b/test/Mathlib/lake-manifest.json
@@ -5,27 +5,27 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "41ff1f7899c971f91362710d4444e338b8acd644",
+   "rev": "e9ae2a61ef5c99d6edac84f0d04f6324c5d97f67",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.15.0-rc1",
+   "inputRev": "v4.15.0-patch1",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover-community/plausible",
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "8e5cb8d424df462f84997dd68af6f40e347c3e35",
+   "rev": "2c57364ef83406ea86d0f78ce3e342079a2fece5",
    "name": "plausible",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.15.0-rc1",
+   "inputRev": "v4.15.0",
    "inherited": true,
    "configFile": "lakefile.toml"},
   {"url": "https://github.com/leanprover-community/LeanSearchClient",
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "d7caecce0d0f003fd5e9cce9a61f1dd6ba83142b",
+   "rev": "003ff459cdd85de551f4dcf95cdfeefe10f20531",
    "name": "LeanSearchClient",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
@@ -35,10 +35,10 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "ed3b856bd8893ade75cafe13e8544d4c2660f377",
+   "rev": "9a0b533c2fbd6195df067630be18e11e4349051c",
    "name": "importGraph",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.15.0-rc1",
+   "inputRev": "v4.15.0",
    "inherited": true,
    "configFile": "lakefile.toml"},
   {"url": "https://github.com/leanprover-community/ProofWidgets4",
@@ -55,30 +55,30 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "8b6048aa0a4a4b6bcf83597802d8dee734e64b7e",
+   "rev": "2689851f387bb2cef351e6825fe94a56a304ca13",
    "name": "aesop",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.15.0-rc1",
+   "inputRev": "v4.15.0",
    "inherited": true,
    "configFile": "lakefile.toml"},
   {"url": "https://github.com/leanprover-community/quote4",
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "ad942fdf0b15c38bface6acbb01d63855a2519ac",
+   "rev": "f0c584bcb14c5adfb53079781eeea75b26ebbd32",
    "name": "Qq",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.14.0",
+   "inputRev": "v4.15.0",
    "inherited": true,
-   "configFile": "lakefile.lean"},
+   "configFile": "lakefile.toml"},
   {"url": "https://github.com/leanprover-community/batteries",
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "7805acf1864ba1a2e359f86a8f092ccf1438ad83",
+   "rev": "e8dc5fc16c625fc4fe08f42d625523275ddbbb4b",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.14.0",
+   "inputRev": "v4.15.0",
    "inherited": true,
    "configFile": "lakefile.toml"},
   {"url": "https://github.com/leanprover/lean4-cli",
diff --git a/test/Mathlib/lakefile.toml b/test/Mathlib/lakefile.toml
index ce5ace7..7e31e6c 100644
--- a/test/Mathlib/lakefile.toml
+++ b/test/Mathlib/lakefile.toml
@@ -4,7 +4,7 @@ defaultTargets = ["ReplMathlibTests"]
 [[require]]
 name = "mathlib"
 git = "https://github.com/leanprover-community/mathlib4"
-rev = "v4.15.0-rc1"
+rev = "v4.15.0-patch1"
 
 [[lean_lib]]
 name = "ReplMathlibTests"
diff --git a/test/Mathlib/lean-toolchain b/test/Mathlib/lean-toolchain
index cf25a98..d0eb99f 100644
--- a/test/Mathlib/lean-toolchain
+++ b/test/Mathlib/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.15.0-rc1
+leanprover/lean4:v4.15.0