diff --git a/.travis.yml b/.travis.yml
index ab6ba6bf..dfeece70 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,11 @@
 os: linux
-dist: focal
+dist: noble
 language: python
 
 jobs:
   include:
-    - python: "3.8"
-      env: TOXENV=py38
-    - python: "3.9"
-      env: TOXENV=py39
+    - python: "3.12"
+      env: TOXENV=py312
 
 cache:
   - pip
diff --git a/lint.sh b/lint.sh
index 5c418249..a7eebda1 100755
--- a/lint.sh
+++ b/lint.sh
@@ -13,4 +13,4 @@ tox
 mypy --ignore-missing-imports "${source_dir}" || true
 pytest "${source_dir}"
 pytest --doctest-modules "${source_dir}" || true
-shopt -s globstar && pyupgrade --py37-plus ${source_dir}/*.py
+shopt -s globstar && pyupgrade --py312-plus ${source_dir}/*.py
diff --git a/patterns/structural/mvc.py b/patterns/structural/mvc.py
index b81e10be..64581d48 100644
--- a/patterns/structural/mvc.py
+++ b/patterns/structural/mvc.py
@@ -14,14 +14,14 @@ def __iter__(self):
         pass
 
     @abstractmethod
-    def get(self, item):
+    def get(self, item: str) -> dict:
         """Returns an object with a .items() call method
         that iterates over key,value pairs of its information."""
         pass
 
     @property
     @abstractmethod
-    def item_type(self):
+    def item_type(self) -> str:
         pass
 
 
@@ -30,7 +30,7 @@ class Price(float):
         """A polymorphic way to pass a float with a particular
         __str__ functionality."""
 
-        def __str__(self):
+        def __str__(self) -> str:
             return f"{self:.2f}"
 
     products = {
@@ -44,7 +44,7 @@ def __str__(self):
     def __iter__(self):
         yield from self.products
 
-    def get(self, product):
+    def get(self, product: str) -> dict:
         try:
             return self.products[product]
         except KeyError as e:
@@ -53,32 +53,32 @@ def get(self, product):
 
 class View(ABC):
     @abstractmethod
-    def show_item_list(self, item_type, item_list):
+    def show_item_list(self, item_type: str, item_list: dict) -> None:
         pass
 
     @abstractmethod
-    def show_item_information(self, item_type, item_name, item_info):
+    def show_item_information(self, item_type: str, item_name: str, item_info: str) -> None:
         """Will look for item information by iterating over key,value pairs
         yielded by item_info.items()"""
         pass
 
     @abstractmethod
-    def item_not_found(self, item_type, item_name):
+    def item_not_found(self, item_type: str, item_name: str) -> None:
         pass
 
 
 class ConsoleView(View):
-    def show_item_list(self, item_type, item_list):
+    def show_item_list(self, item_type: str, item_list: dict) -> None:
         print(item_type.upper() + " LIST:")
         for item in item_list:
             print(item)
         print("")
 
     @staticmethod
-    def capitalizer(string):
+    def capitalizer(string) -> str:
         return string[0].upper() + string[1:].lower()
 
-    def show_item_information(self, item_type, item_name, item_info):
+    def show_item_information(self, item_type, item_name, item_info) -> None:
         print(item_type.upper() + " INFORMATION:")
         printout = "Name: %s" % item_name
         for key, value in item_info.items():
@@ -86,21 +86,21 @@ def show_item_information(self, item_type, item_name, item_info):
         printout += "\n"
         print(printout)
 
-    def item_not_found(self, item_type, item_name):
+    def item_not_found(self, item_type: str, item_name: str) -> None:
         print(f'That {item_type} "{item_name}" does not exist in the records')
 
 
 class Controller:
-    def __init__(self, model, view):
-        self.model = model
-        self.view = view
+    def __init__(self, model_class, view_class) -> None:
+        self.model = model_class
+        self.view = view_class
 
-    def show_items(self):
+    def show_items(self) -> None:
         items = list(self.model)
         item_type = self.model.item_type
         self.view.show_item_list(item_type, items)
 
-    def show_item_information(self, item_name):
+    def show_item_information(self, item_name: str) -> None:
         """
         Show information about a {item_type} item.
         :param str item_name: the name of the {item_type} item to show information about
@@ -119,17 +119,17 @@ class Router:
     def __init__(self):
         self.routes = {}
 
-    def register(self, path, controller, model, view):
-        model = model()
-        view = view()
-        self.routes[path] = controller(model, view)
+    def register(self, path: str, controller_class, model_class, view_class) -> None:
+        model_instance = model_class()
+        view_instance = view_class()
+        self.routes[path] = controller_class(model_instance, view_instance)
 
-    def resolve(self, path):
+    def resolve(self, path: str) -> Controller:
         if self.routes.get(path):
-            controller = self.routes[path]
+            controller: Controller = self.routes[path]
             return controller
         else:
-            return None
+            raise KeyError(f"No controller registered for path '{path}'")
 
 
 def main():
@@ -168,13 +168,13 @@ def main():
 if __name__ == "__main__":
     router = Router()
     router.register("products", Controller, ProductModel, ConsoleView)
-    controller = router.resolve(argv[1])
+    controller: Controller = router.resolve(argv[1])
 
-    command = str(argv[2]) if len(argv) > 2 else None
-    args = ' '.join(map(str, argv[3:])) if len(argv) > 3 else None
+    action: str = str(argv[2]) if len(argv) > 2 else ""
+    args: str = ' '.join(map(str, argv[3:])) if len(argv) > 3 else ""
 
-    if hasattr(controller, command):
-        command = getattr(controller, command)
+    if hasattr(controller, action):
+        command = getattr(controller, action)
         sig = signature(command)
 
         if len(sig.parameters) > 0:
@@ -185,7 +185,7 @@ def main():
         else:
             command()
     else:
-        print(f"Command {command} not found in the controller.")
+        print(f"Command {action} not found in the controller.")
 
     import doctest
     doctest.testmod()
diff --git a/setup.cfg b/setup.cfg
index eb556c0a..e109555b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -9,5 +9,5 @@ filterwarnings =
     ignore:.*test class 'TestRunner'.*:Warning
 
 [mypy]
-python_version = 3.8
+python_version = 3.12
 ignore_missing_imports = True
diff --git a/setup.py b/setup.py
index ec2528f4..72bc2b46 100644
--- a/setup.py
+++ b/setup.py
@@ -5,13 +5,10 @@
     packages=find_packages(),
     description="A collection of design patterns and idioms in Python.",
     classifiers=[
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
     ],
 )
diff --git a/tox.ini b/tox.ini
index 3ce6e132..7c23885f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py38,py39,py310,cov-report
+envlist = py310,py312,cov-report
 skip_missing_interpreters = true