diff --git a/aqt/archives.py b/aqt/archives.py
index 6061a268..82d4aa19 100644
--- a/aqt/archives.py
+++ b/aqt/archives.py
@@ -173,7 +173,7 @@ def _version_str(self) -> str:
 class Updates:
     package_updates: List[PackageUpdate]
 
-    def __init__(self):
+    def __init__(self) -> None:
         self.package_updates = []
 
     def extend(self, other):
diff --git a/aqt/exceptions.py b/aqt/exceptions.py
index 972488c0..3b161835 100644
--- a/aqt/exceptions.py
+++ b/aqt/exceptions.py
@@ -24,7 +24,7 @@
 
 
 class AqtException(Exception):
-    def __init__(self, *args, suggested_action: Optional[List[str]] = None, should_show_help: bool = False, **kwargs):
+    def __init__(self, *args, suggested_action: Optional[List[str]] = None, should_show_help: bool = False, **kwargs) -> None:
         self.suggested_action: List[str] = suggested_action or []
         self.should_show_help: bool = should_show_help or False
         super(AqtException, self).__init__(*args, **kwargs)
@@ -53,7 +53,7 @@ class ArchiveChecksumError(ArchiveDownloadError):
 
 
 class ChecksumDownloadFailure(ArchiveDownloadError):
-    def __init__(self, *args, suggested_action: Optional[List[str]] = None, **kwargs):
+    def __init__(self, *args, suggested_action: Optional[List[str]] = None, **kwargs) -> None:
         if suggested_action is None:
             suggested_action = []
         suggested_action.extend(
diff --git a/aqt/helper.py b/aqt/helper.py
index 0777fc5f..4cc0149e 100644
--- a/aqt/helper.py
+++ b/aqt/helper.py
@@ -257,7 +257,7 @@ def altlink(url: str, alt: str) -> str:
 
 
 class MyQueueListener(QueueListener):
-    def __init__(self, queue):
+    def __init__(self, queue) -> None:
         handlers: List[Handler] = []
         super().__init__(queue, *handlers)
 
@@ -347,7 +347,7 @@ def __new__(cls, *p, **k):
         self.__dict__ = cls._shared_state
         return self
 
-    def __init__(self):
+    def __init__(self) -> None:
         if self.config is None:
             with self._lock:
                 if self.config is None:
diff --git a/aqt/installer.py b/aqt/installer.py
index 806145e4..086d1f00 100644
--- a/aqt/installer.py
+++ b/aqt/installer.py
@@ -149,7 +149,7 @@ class Cli:
 
     UNHANDLED_EXCEPTION_CODE = 254
 
-    def __init__(self):
+    def __init__(self) -> None:
         parser = argparse.ArgumentParser(
             prog="aqt",
             description="Another unofficial Qt Installer.\naqt helps you install Qt SDK, tools, examples and others\n",
diff --git a/aqt/metadata.py b/aqt/metadata.py
index 4e7eb87c..4bedbe8e 100644
--- a/aqt/metadata.py
+++ b/aqt/metadata.py
@@ -79,7 +79,7 @@ def __init__(
         prerelease=None,
         build=None,
         partial=False,
-    ):
+    ) -> None:
         if version_string is None:
             super(Version, self).__init__(
                 version_string=None,
diff --git a/aqt/updater.py b/aqt/updater.py
index b4f953eb..417f2bac 100644
--- a/aqt/updater.py
+++ b/aqt/updater.py
@@ -47,7 +47,7 @@ def unpatched_paths() -> List[str]:
 
 
 class Updater:
-    def __init__(self, prefix: Path, logger):
+    def __init__(self, prefix: Path, logger) -> None:
         self.logger = logger
         self.prefix = prefix
         self.qmake_path: Optional[Path] = None
diff --git a/pyproject.toml b/pyproject.toml
index 57f323d7..ea467f33 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,6 +69,7 @@ check = [
     "pygments",
     "packaging",
     "pylint",
+    "types-requests",
 ]
 docs = [
     "sphinx>=7.0",