diff --git a/pyproject.toml b/pyproject.toml
index 092d0ba..62c014f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ docs = [
     "sphinx-book-theme==0.3.3",
 ]
 dev = [
-    "mypy>=0.982,<1",
+    "mypy>=0.982,<2",
     "pre-commit>=2.0.0,<4",
     "pyright>=1.0.0,<2",
     "pytest>=6.0.0,<8",