diff --git a/pyproject.toml b/pyproject.toml
index c2e18c0..f876ae1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ dev = [
     "pytest>=7.0.0",
     "black>=23.0.0",
     "flake8>=6.0.0",
-    "mypy>=1.0.0",
+    "mypy>=1.19.1",
 ]
 unc = [
     "unctools>=0.1.0",