diff --git a/pyproject.toml b/pyproject.toml
index 57907ce..c434e5c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ Documentation = "https://iderare-pheno.readthedocs.io/"
 [project.optional-dependencies]
 dev = [
     "ruff",
-    "mypy>=1.0,<1.19",
+    "mypy>=1.0,<1.20",
     "types-PyYAML",
     "black>=23.0,<26.0",
     "black[jupyter]",