diff --git a/lake-manifest.json b/lake-manifest.json
index dda536e..85a3c84 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -5,20 +5,20 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "a4a08d92be3de00def5298059bf707c72dfd3c66",
+   "rev": "5a0ec8588855265ade536f35bcdcf0fb24fd6030",
    "name": "aesop",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "master",
+   "inputRev": "v4.14.0",
    "inherited": false,
    "configFile": "lakefile.toml"},
   {"url": "https://github.com/leanprover-community/batteries.git",
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "f007bfe46ea8fb801ec907df9ab540054abcc5fd",
+   "rev": "8d6c853f11a5172efa0e96b9f2be1a83d861cdd9",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "main",
+   "inputRev": "v4.14.0",
    "inherited": false,
    "configFile": "lakefile.toml"}],
  "name": "LeanCopilot",
diff --git a/lakefile.lean b/lakefile.lean
index 746bd27..dd4a97f 100644
--- a/lakefile.lean
+++ b/lakefile.lean
@@ -303,8 +303,8 @@ extern_lib libleanffi pkg := do
   buildStaticLib (pkg.nativeLibDir / name) #[ct2O]
 
 
-require batteries from git "https://github.com/leanprover-community/batteries.git" @ "main"
-require aesop from git "https://github.com/leanprover-community/aesop" @ "master"
+require batteries from git "https://github.com/leanprover-community/batteries.git" @ "v4.14.0"
+require aesop from git "https://github.com/leanprover-community/aesop" @ "v4.14.0"
 
 meta if get_config? env = some "dev" then -- dev is so not everyone has to build it
-require «doc-gen4» from git "https://github.com/leanprover/doc-gen4" @ "main"
+require «doc-gen4» from git "https://github.com/leanprover/doc-gen4" @ "v4.14.0"
diff --git a/lean-toolchain b/lean-toolchain
index 3450f2d..401bc14 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.15.0-rc1
\ No newline at end of file
+leanprover/lean4:v4.14.0
\ No newline at end of file