diff --git a/pyproject.toml b/pyproject.toml
index d784d2a..15ad506 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "ruff",
-    "mypy>=1.0,<1.6",
+    "mypy>=1.0,<1.8",
     "types-requests",
     "types-cachetools",
     "types-PyYAML",