diff --git a/pyproject.toml b/pyproject.toml
index 0763be41..1a5ce8a1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -98,6 +98,7 @@ dev = [
 export = [
     "onnx>=1.12.0", # ONNX export
     "coremltools>=7.0; platform_system != 'Windows' and python_version <= '3.11'", # CoreML supported on macOS and Linux
+    "scikit-learn>=1.3.2; platform_system != 'Windows' and python_version <= '3.11'", # CoreML k-means quantization
     "openvino>=2024.0.0", # OpenVINO export
     "tensorflow>=2.0.0", # TF bug https://github.com/ultralytics/ultralytics/issues/5161
     "tensorflowjs>=3.9.0", # TF.js export, automatically installs tensorflow