diff --git a/requirements-test.txt b/requirements-test.txt
index af50247..8be82f7 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,4 +1,4 @@
 coverage == 7.4.*
-mypy == 1.8.*
+mypy == 1.9.*
 pre-commit == 3.5.*
 tox == 4.13.*
diff --git a/tox.ini b/tox.ini
index e71b430..8e2f940 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,6 @@ deps =
 
 commands =
     pre-commit run -a
-    mypy --install-types --non-interactive
+    mypy --install-types --non-interactive --strict
     coverage run --append --source=codicefiscale -m unittest
     coverage report --show-missing --ignore-errors