diff --git a/plugins/Marketplace/Marketplace.py b/plugins/Marketplace/Marketplace.py
index 506b8347e2..0dd5b29a5a 100644
--- a/plugins/Marketplace/Marketplace.py
+++ b/plugins/Marketplace/Marketplace.py
@@ -21,12 +21,13 @@ if TYPE_CHECKING:
 ROOT_URL = f"{UltimakerCloudConstants.CuraCloudAPIRoot}/cura-packages/v{UltimakerCloudConstants.CuraCloudAPIVersion}/cura/v{CuraSDKVersion}"  # Root of all Marketplace API requests.
 PACKAGES_URL = f"{ROOT_URL}/packages"  # URL to use for requesting the list of packages.
 
+
 class Marketplace(Extension):
     """
     The main managing object for the Marketplace plug-in.
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
         self._window: Optional["QObject"] = None  # If the window has been loaded yet, it'll be cached in here.
 
diff --git a/plugins/Marketplace/PackageList.py b/plugins/Marketplace/PackageList.py
index f4bb0374ba..4980ec4a81 100644
--- a/plugins/Marketplace/PackageList.py
+++ b/plugins/Marketplace/PackageList.py
@@ -21,6 +21,7 @@ if TYPE_CHECKING:
 
 catalog = i18nCatalog("cura")
 
+
 class PackageList(ListModel):
     """
     Represents a list of packages to be displayed in the interface.
@@ -33,7 +34,7 @@ class PackageList(ListModel):
 
     ITEMS_PER_PAGE = 20  # Pagination of number of elements to download at once.
 
-    def __init__(self, parent: "QObject" = None):
+    def __init__(self, parent: "QObject" = None) -> None:
         super().__init__(parent)
 
         self._is_loading = True
diff --git a/plugins/Marketplace/PackageModel.py b/plugins/Marketplace/PackageModel.py
index eba9d63a6c..5ca25b370b 100644
--- a/plugins/Marketplace/PackageModel.py
+++ b/plugins/Marketplace/PackageModel.py
@@ -16,7 +16,7 @@ class PackageModel(QObject):
     QML. The model can also be constructed directly from a response received by the API.
     """
 
-    def __init__(self, package_data: Dict[str, Any], parent: QObject = None):
+    def __init__(self, package_data: Dict[str, Any], parent: QObject = None) -> None:
         """
         Constructs a new model for a single package.
         :param package_data: The data received from the Marketplace API about the package to create.