diff --git a/backend/algorithms/tests/test_autoplanning.py b/backend/algorithms/tests/test_autoplanning.py
index 32aec5857..8ee4a17c7 100644
--- a/backend/algorithms/tests/test_autoplanning.py
+++ b/backend/algorithms/tests/test_autoplanning.py
@@ -1,3 +1,4 @@
+from typing import Optional
 from pytest import raises
 from algorithms.autoplanning import autoplan, terms_between
 from algorithms.objects.course import Course
@@ -129,7 +130,7 @@ def assert_autoplanning_guarantees(uoc_max: list[int], courses: list[Course], pr
         course_names = [course[0] for course in res if terms_between((2020, 0), course[1]) == index]
         assert number >= sum(get_uoc(course_name, courses) for course_name in course_names)
     # all courses valid
-    plan: list[list[dict[str, tuple[int, int]]]] = [[{}, {}, {}, {}] for _ in range(2023-2020)]
+    plan: list[list[dict[str, tuple[int, Optional[int]]]]] = [[{}, {}, {}, {}] for _ in range(2023-2020)]
     for course_name, (course_year, course_term) in res:
         plan[course_year - 2020][course_term][course_name] = (get_uoc(course_name, courses), get_mark(course_name, courses))
     assert all(course_state['is_accurate'] for course_state in validate_terms(ValidPlannerData(
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 711d3d05d..4ace84c40 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -2,8 +2,8 @@
 fastapi==0.88.0
 fuzzywuzzy==0.18.0
 hypothesis==6.61.0
-mypy==0.991
-mypy-extensions==0.4.4
+mypy==1.1.1
+mypy-extensions==1.0.0
 ortools==9.5.2237
 pymongo==4.3.3
 pytest==7.2.2