diff --git a/pyproject.toml b/pyproject.toml
index ea79f67..f268a5a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ desktop = ["pywebview>=5.0,<6"]
 # Development tooling: testing + type checking.
 dev = [
     "pytest>=8,<9",
-    "mypy>=1.10,<2",
+    "mypy>=1.10,<3",
     "hypothesis>=6.100,<7",
 ]