diff --git a/skill/pyproject.toml b/skill/pyproject.toml
index 3cf7ab0..952c5a8 100644
--- a/skill/pyproject.toml
+++ b/skill/pyproject.toml
@@ -16,7 +16,7 @@ test = [
 # Eval harness — install separately: uv sync --extra eval
 eval = [
     "anthropic>=0.116.0",
-    "deepeval>=3.9.9",
+    "deepeval>=4.1.1",
     "python-dotenv>=1.2.2",
 ]
 lint = [