diff --git a/test_requirements.txt b/test_requirements.txt
index 3e7d3fef79dd..7d4f9a692c79 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -10,5 +10,5 @@ cffi; python_version < '3.10'
 # For testing types. Notes on the restrictions:
 # - Mypy relies on C API features not present in PyPy
 # NOTE: Keep mypy in sync with environment.yml
-mypy==0.981; platform_python_implementation != "PyPy"
+mypy==0.991; platform_python_implementation != "PyPy"
 typing_extensions>=4.2.0