diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 3a23f44..3f7b6e3 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -22,7 +22,7 @@ jobs:
     # Run jobs for a couple of Python versions.
     strategy:
       matrix:
-        python: ["3.8", "3.9", "3.10"]
+        python: ["3.9", "3.10", "3.11"]
 
     name: TestCoverage - Python ${{ matrix.python }}
 
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 2efed66..babe732 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -22,7 +22,7 @@ jobs:
     # Run jobs for a couple of Python versions.
     strategy:
       matrix:
-        python: ["3.8", "3.9", "3.10"]
+        python: ["3.9", "3.10", "3.11"]
 
     name: Style - Python ${{ matrix.python }}
 
diff --git a/setup.cfg b/setup.cfg
index bb47b87..84cf753 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -21,7 +21,7 @@ include_package_data = True
 package_dir =
     = src
 packages = find_namespace:
-python_requires = >=3.8,!=3.9.7,<3.11
+python_requires = >=3.9,!=3.9.7
 
 install_requires =
     numpy>=1.20
diff --git a/src/orquestra/integrations/qulacs/conversions.py b/src/orquestra/integrations/qulacs/conversions.py
index 931a14d..0c3e4c5 100644
--- a/src/orquestra/integrations/qulacs/conversions.py
+++ b/src/orquestra/integrations/qulacs/conversions.py
@@ -32,7 +32,7 @@ def _factory(*args):
     return _factory
 
 
-QULACS_GATE_FACTORY = Callable[[Any], qulacs.QuantumGateBase]
+QULACS_GATE_FACTORY = Callable[..., qulacs.QuantumGateBase]
 
 ORQUESTRA_TO_QULACS_GATES: Dict[str, Tuple[QULACS_GATE_FACTORY, Callable]] = {
     # 1-qubit, non-parametric