diff --git a/pyproject.toml b/pyproject.toml
index d25968b..824b710 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,10 @@ dependencies = [
     "mokapot>=0.9",
     "ms2pip>=4.0.0-dev10",
     "ms2rescore_rs",
+    # "numpy==1.24.3; python_version == '3.11'", # Incompatibility with sklearn, pygam, and TF...
+    # "numpy>=1.16.0; python_version != '3.11'",
     "numpy>=1.16.0",
+    "scikit-learn==1.5.1",
     "pandas>=1.0",
     "plotly>=5",
     "psm_utils>=0.9",