diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9a48a6331..3f34da0b6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -74,10 +74,10 @@ jobs:
         run: |
           uv run pylint --recursive=y examples pymodbus test
 
-      - name: mypy
+      - name: Type check with zuban
         if: matrix.run_lint == true
         run: |
-          uv run mypy pymodbus examples
+          uv run zuban check pymodbus examples
 
       - name: ruff
         if: matrix.run_lint == true
diff --git a/check_ci.sh b/check_ci.sh
index 5edcd42f6..b00381b95 100755
--- a/check_ci.sh
+++ b/check_ci.sh
@@ -8,6 +8,6 @@ trap 'echo "\"${last_command}\" command filed with exit code $?."' EXIT
 codespell
 ruff check --fix --exit-non-zero-on-fix .
 pylint --recursive=y examples pymodbus test
-mypy pymodbus examples
+zuban pymodbus examples
 pytest -x --cov --numprocesses auto
 echo "Ready to push"
diff --git a/examples/custom_msg.py b/examples/custom_msg.py
index 963363758..6670c8022 100755
--- a/examples/custom_msg.py
+++ b/examples/custom_msg.py
@@ -46,7 +46,7 @@ class CustomModbusResponse(ModbusPDU):
     def __init__(self, values: list[int] | None = None, device_id=1, transaction=0):
         """Initialize."""
         super().__init__(dev_id=device_id, transaction_id=transaction)
-        self.values = values or []
+        self.values: list[int] = values or []
 
     def encode(self):
         """Encode response pdu.
diff --git a/examples/server_async.py b/examples/server_async.py
index a9df0fb18..f1d9a5f8e 100755
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -85,7 +85,7 @@ def setup_server(description=None, context=None, cmdline=None):
         elif args.store == "sparse":  # pragma: no cover
             # Continuing, or use a sparse DataBlock which can have gaps
             datablock = lambda : ModbusSparseDataBlock({0x00: 0, 0x05: 1})  # pylint: disable=unnecessary-lambda-assignment
-        else: # args.store == "factory" # pragma: no cover
+        elif args.store == "factory" or True:  # pragma: no cover  # pylint: disable=condition-evals-to-constant
             # Alternately, use the factory methods to initialize the DataBlocks
             # or simply do not pass them to have them initialized to 0x00 on the
             # full address range::
diff --git a/pymodbus/datastore/context.py b/pymodbus/datastore/context.py
index e91821d9c..0efd2456f 100644
--- a/pymodbus/datastore/context.py
+++ b/pymodbus/datastore/context.py
@@ -161,7 +161,7 @@ def __init__(self, devices=None, single=True):
         :param single: Set to true to treat this as a single context
         """
         self.single = single
-        self._devices = devices or {}  # type: ignore[var-annotated, unused-ignore]
+        self._devices: dict = devices or {}
         if self.single:
             self._devices = {0: self._devices}
 
diff --git a/pymodbus/pdu/mei_message.py b/pymodbus/pdu/mei_message.py
index 5b0d6f960..d77e217c9 100644
--- a/pymodbus/pdu/mei_message.py
+++ b/pymodbus/pdu/mei_message.py
@@ -97,7 +97,7 @@ def __init__(self, read_code: int | None = None, information: dict[int, Any] | N
         """Initialize a new instance."""
         super().__init__(transaction_id=transaction_id, dev_id=dev_id)
         self.read_code = read_code or DeviceInformation.BASIC
-        self.information = information or {}
+        self.information: dict[int, Any] = information or {}
         self.number_of_objects = 0
         self.conformity = 0x83  # I support everything right now
         self.next_object_id = 0x00
diff --git a/pymodbus/transport/transport.py b/pymodbus/transport/transport.py
index 6a42de26f..3227378f5 100644
--- a/pymodbus/transport/transport.py
+++ b/pymodbus/transport/transport.py
@@ -127,7 +127,7 @@ def generate_ssl(
             )
         return new_sslctx
 
-    def copy(self) -> CommParams:
+    def copy(self: CommParams) -> CommParams:
         """Create a copy."""
         return copy.copy(self)
 
diff --git a/pyproject.toml b/pyproject.toml
index 9afc21fd4..d1084b637 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,7 +58,6 @@ development = [
     "build>=1.2.2",
     "codespell>=2.3.0",
     "coverage>=7.10.7",
-    "mypy>=1.18.2",
     "pylint>=4.0.0",
     "pytest>=8.4.2",
     "pytest-asyncio>=1.2.0",
@@ -70,7 +69,8 @@ development = [
     "ruff>=0.13.1",
     "twine>=6.2.0",
     "types-Pygments",
-    "types-pyserial"
+    "types-pyserial",
+    "zuban>=0.3.0"
 ]
 all = [
     "pymodbus[serial, simulator, documentation, development]"