diff --git a/scipy-stubs/optimize/_cobyla_py.pyi b/scipy-stubs/optimize/_cobyla_py.pyi
index 5c4850fd..a02284bb 100644
--- a/scipy-stubs/optimize/_cobyla_py.pyi
+++ b/scipy-stubs/optimize/_cobyla_py.pyi
@@ -1,18 +1,19 @@
-from collections.abc import Callable
-from typing import Literal
+from collections.abc import Callable, Sequence
+from typing import Concatenate, Literal, TypeAlias
 
 import numpy as np
 import optype.numpy as onp
-from scipy._typing import Untyped, UntypedCallable
 
 __all__ = ["fmin_cobyla"]
 
+_Ignored: TypeAlias = object
+
 ###
 
 def fmin_cobyla(
-    func: UntypedCallable,
-    x0: Untyped,
-    cons: Untyped,
+    func: Callable[Concatenate[onp.Array1D[np.float64], ...], onp.ToFloat],
+    x0: onp.ToArray1D,
+    cons: Sequence[Callable[[onp.Array1D[np.float64]], onp.ToFloat | onp.ToFloat1D]],
     args: tuple[object, ...] = (),
     consargs: tuple[object, ...] | None = None,
     rhobeg: onp.ToFloat = 1.0,
@@ -21,5 +22,5 @@ def fmin_cobyla(
     disp: Literal[0, 1, 2, 3] | None = None,
     catol: onp.ToFloat = 0.0002,
     *,
-    callback: Callable[[onp.Array1D[np.float64]], None] | None = None,
+    callback: Callable[[onp.Array1D[np.float64]], _Ignored] | None = None,
 ) -> onp.Array1D[np.float64]: ...