diff --git a/pyproject.toml b/pyproject.toml
index 416bde6b1368..4515823ee8db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,7 +69,7 @@ test = [
     "hypothesis>=6.130.0",
     "lxml>=4.9.4",
     "lxml-stubs>=0.4.0",
-    "mypy>=1.16.0",
+    "mypy>=1.20.0",
     "pandas-stubs>=1.2.0.1",
     "pytest>=8.2.0",
     "pytest-asyncio>=0.24.0",
diff --git a/requirements.txt b/requirements.txt
index 79da4bf2c941..f7a932228975 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -194,7 +194,7 @@ matplotlib-inline==0.2.1
     #   ipython
 mistune==3.2.0
     # via nbconvert
-mypy==1.19.1
+mypy==1.20.0
     # via qcodes (pyproject.toml)
 mypy-extensions==1.1.0
     # via mypy
diff --git a/src/qcodes/extensions/infer.py b/src/qcodes/extensions/infer.py
index d22b4060fd6c..a88c98783d07 100644
--- a/src/qcodes/extensions/infer.py
+++ b/src/qcodes/extensions/infer.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from collections.abc import Sequence
-from typing import TYPE_CHECKING, ClassVar, TypeVar, cast
+from typing import TYPE_CHECKING, ClassVar, TypeVar
 
 from qcodes.instrument import Instrument, InstrumentBase, InstrumentModule
 from qcodes.parameters import DelegateParameter, Parameter, ParameterBase
@@ -230,7 +230,7 @@ def get_chain_links_of_type(
 ) -> tuple[C, ...]:
     """Gets all parameters in a chain of linked parameters that match a given type"""
     chain_links: list[C] = [
-        cast("C", param)
+        param
         for param in get_parameter_chain(parameter)
         if isinstance(param, link_param_type)
     ]
@@ -265,7 +265,7 @@ def get_parent_instruments_from_chain_of_type(
     param_chain = get_parameter_chain(parameter)
     return tuple(
         [
-            cast("TInstrument", param.instrument)
+            param.instrument
             for param in param_chain
             if isinstance(param.instrument, instrument_type)
         ]
diff --git a/src/qcodes/instrument_drivers/AlazarTech/dll_wrapper.py b/src/qcodes/instrument_drivers/AlazarTech/dll_wrapper.py
index 15ef43685039..d7573bb5836e 100644
--- a/src/qcodes/instrument_drivers/AlazarTech/dll_wrapper.py
+++ b/src/qcodes/instrument_drivers/AlazarTech/dll_wrapper.py
@@ -179,10 +179,10 @@ def __apply_signatures(self) -> None:
             if ret_type is RETURN_CODE:
                 # since RETURN_CODE is a NewType checking that
                 # ret_type is RETURN_CODE only narrows the type
-                # of it to type. The type checker therefor does not know
+                # of it to type. The type checker therefore does not know
                 # that this type has a __supertype__ attribute
                 ret_type = (
-                    ret_type.__supertype__  # pyright: ignore[reportFunctionMemberAccess]
+                    ret_type.__supertype__  # type: ignore[attr-defined]
                 )
                 c_func.errcheck = _check_error_code
             elif ret_type in (
diff --git a/src/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py b/src/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py
index 9a219dc378c6..479399c571b2 100644
--- a/src/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py
+++ b/src/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py
@@ -378,7 +378,7 @@ def clear_timer_count(self) -> None:
 
 class StatusMixin:
     def __init__(self) -> None:
-        self.names = tuple(["param1", "param2"])
+        self.names: tuple[str, ...] = ("param1", "param2")
 
     def status_summary(self) -> dict[str, str]:
         return_dict: dict[str, str] = {}