diff --git a/pyproject.toml b/pyproject.toml
index f554044..8c14c0a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,4 +16,7 @@ dependencies = [
 [dependency-groups]
 dev = [
     "black>=24.10.0",
+    "mypy>=1.19.1",
+    "types-pygments>=2.19.0.20251121",
+    "types-requests>=2.32.4.20260107",
 ]