diff --git a/pact-python-cli/pyproject.toml b/pact-python-cli/pyproject.toml
index 5f881746f..2c8ccf4ae 100644
--- a/pact-python-cli/pyproject.toml
+++ b/pact-python-cli/pyproject.toml
@@ -53,7 +53,7 @@ requires-python = ">=3.10"
 # developper consistency. All other dependencies are as above.
 dev   = ["ruff==0.14.6", { include-group = "test" }, { include-group = "types" }]
 test  = ["pytest-cov~=7.0", "pytest~=9.0"]
-types = ["mypy==1.18.2"]
+types = ["mypy==1.19.0"]
 
 ################################################################################
 ## Build System
diff --git a/pact-python-ffi/pyproject.toml b/pact-python-ffi/pyproject.toml
index 006adea0d..f7f006019 100644
--- a/pact-python-ffi/pyproject.toml
+++ b/pact-python-ffi/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = ["cffi~=2.0"]
 [dependency-groups]
 dev   = ["ruff==0.14.6", { include-group = "test" }, { include-group = "types" }]
 test  = ["pytest-cov~=7.0", "pytest~=9.0"]
-types = ["mypy==1.18.2", "typing-extensions~=4.0"]
+types = ["mypy==1.19.0", "typing-extensions~=4.0"]
 
 ################################################################################
 ## Build System
diff --git a/pyproject.toml b/pyproject.toml
index f6d153a39..dcf9a9b60 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -121,7 +121,7 @@ test = [
   "testcontainers~=4.0",
 ]
 types = [
-  "mypy==1.18.2",
+  "mypy==1.19.0",
   "types-grpcio~=1.0",
   "types-protobuf~=6.0",
   "types-requests~=2.0",
diff --git a/src/pact/generate/__init__.py b/src/pact/generate/__init__.py
index 26741ff7f..5067c3a9c 100644
--- a/src/pact/generate/__init__.py
+++ b/src/pact/generate/__init__.py
@@ -146,7 +146,7 @@ def __import__(  # noqa: N807
     name: builtins.str,
     globals: Mapping[builtins.str, object] | None = None,
     locals: Mapping[builtins.str, object] | None = None,
-    fromlist: Sequence[builtins.str] = (),
+    fromlist: Sequence[builtins.str] | None = None,
     level: builtins.int = 0,
 ) -> ModuleType:
     """
@@ -157,6 +157,7 @@ def __import__(  # noqa: N807
     done to avoid shadowing built-in types and functions.
     """
     __tracebackhide__ = True
+    fromlist = fromlist or ()
     if name == "pact.generate" and len(set(fromlist) - {"AbstractGenerator"}) > 0:
         warnings.warn(
             "Avoid `from pact.generate import <func>`. "
diff --git a/src/pact/match/__init__.py b/src/pact/match/__init__.py
index c6af3ceda..0d0503b7c 100644
--- a/src/pact/match/__init__.py
+++ b/src/pact/match/__init__.py
@@ -317,7 +317,7 @@ def __import__(  # noqa: N807
     name: builtins.str,
     globals: Mapping[builtins.str, object] | None = None,
     locals: Mapping[builtins.str, object] | None = None,
-    fromlist: Sequence[builtins.str] = (),
+    fromlist: Sequence[builtins.str] | None = None,
     level: builtins.int = 0,
 ) -> ModuleType:
     """
@@ -328,6 +328,7 @@ def __import__(  # noqa: N807
     avoid shadowing built-in types and functions.
     """
     __tracebackhide__ = True
+    fromlist = fromlist or ()
     if name == "pact.match" and len(set(fromlist) - {"AbstractMatcher"}) > 0:
         warnings.warn(
             "Avoid `from pact.match import <func>`. "