diff --git a/requirements.txt b/requirements.txt
index dc7d4bb..c85cb57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,5 +40,9 @@ pyyaml>=6.0.0
 pytest>=8.0.0
 pytest-asyncio>=0.24.0
 
+# ML/Calibration (used by confidence and sentiment calibrators)
+numpy>=1.26.0
+scikit-learn>=1.4.0
+
 # Code quality
 ruff==0.15.10