diff --git a/pyproject.toml b/pyproject.toml
index 15dc3b8..88100c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,6 +63,7 @@ dev = [
     "pytest-cov>=6.0.0",
     "ruff>=0.13.0",
     "ty>=0.0.20",
+    "anthropic>=0.40.0",
 ]
 
 [project.urls]