diff --git a/game/missiongenerator/aircraft/waypoints/waypointgenerator.py b/game/missiongenerator/aircraft/waypoints/waypointgenerator.py
index 517d1049..86ed3944 100644
--- a/game/missiongenerator/aircraft/waypoints/waypointgenerator.py
+++ b/game/missiongenerator/aircraft/waypoints/waypointgenerator.py
@@ -1,5 +1,6 @@
 import itertools
 import random
+from collections.abc import Iterator
 from datetime import datetime, timedelta
 from typing import Any
 
@@ -151,7 +152,7 @@ class WaypointGenerator:
         min_fuel: float = consumption.min_safe
 
         # The flight plan (in reverse) up to and including the arrival point.
-        main_flight_plan = reversed(waypoints)
+        main_flight_plan: Iterator[FlightWaypoint] = reversed(waypoints)
         try:
             while waypoint := next(main_flight_plan):
                 if waypoint.waypoint_type is FlightWaypointType.LANDING_POINT:
diff --git a/requirements.txt b/requirements.txt
index feb60318..50f392fc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,47 +1,55 @@
-altgraph==0.17
+altgraph==0.17.2
 appdirs==1.4.4
+atomicwrites==1.4.0
 attrs==21.2.0
-black==21.4b0
-certifi==2020.12.5
-cfgv==3.2.0
-click==7.1.2
-distlib==0.3.1
-Faker==8.2.1
-filelock==3.0.12
+backports.entry-points-selectable==1.1.1
+black==21.11b1
+certifi==2021.10.8
+cfgv==3.3.1
+click==8.0.3
+colorama==0.4.4
+distlib==0.3.3
+Faker==9.8.2
+filelock==3.4.0
 future==0.18.2
-identify==1.5.13
+identify==2.4.0
 iniconfig==1.1.1
-Jinja2==2.11.3
-macholib==1.14
-MarkupSafe==1.1.1
-mypy==0.812
+Jinja2==3.0.3
+macholib==1.15.2
+MarkupSafe==2.0.1
+mypy==0.910
 mypy-extensions==0.4.3
-nodeenv==1.5.0
-packaging==20.9
-pathspec==0.8.1
-pefile==2019.4.18
-Pillow==8.3.2
-pluggy==0.13.1
-pre-commit==2.10.1
-py==1.10.0
--e git://github.com/pydcs/dcs@6608b2ac083ed4ab127b56ec1490fe05070e04ae#egg=pydcs
-pyinstaller==4.3
-pyinstaller-hooks-contrib==2021.1
-pyparsing==2.4.7
-pyproj==3.0.1
+nodeenv==1.6.0
+packaging==21.3
+pathspec==0.9.0
+pefile==2021.9.3
+Pillow==8.4.0
+platformdirs==2.4.0
+pluggy==1.0.0
+pre-commit==2.15.0
+py==1.11.0
+-e git+git://github.com/pydcs/dcs@6608b2ac083ed4ab127b56ec1490fe05070e04ae#egg=pydcs
+pyinstaller==4.7
+pyinstaller-hooks-contrib==2021.3
+pyparsing==3.0.6
+pyproj==3.3.0
 PySide2==5.15.2
-pytest==6.2.4
-python-dateutil==2.8.1
+pytest==6.2.5
+python-dateutil==2.8.2
 pywin32-ctypes==0.2.0
-PyYAML==5.4.1
-regex==2020.11.13
-Shapely==1.7.1
+PyYAML==6.0
+regex==2021.11.10
+Shapely==1.8.0
 shiboken2==5.15.2
-six==1.15.0
-tabulate==0.8.7
+six==1.16.0
+tabulate==0.8.9
 text-unidecode==1.3
 toml==0.10.2
-typed-ast==1.4.2
-types-Pillow==8.3.1
-typing-extensions==3.7.4.3
-virtualenv==20.4.2
+tomli==1.2.2
+typed-ast==1.5.0
+types-certifi==2021.10.8.0
+types-Pillow==8.3.7
+types-PyYAML==6.0.1
+types-tabulate==0.8.3
+typing_extensions==4.0.0
+virtualenv==20.10.0