diff --git a/pyproject.toml b/pyproject.toml
index 60ca5c0..ef61272 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,9 @@ dependencies = [
     "pillow>=10.4.0,<11.0; python_version<'3.13'",
     "pillow>=11.0,<12.0; python_version>='3.13'",
     "safetensors>=0.4.4,<1.0",
+    # python 3.13 workaround for now:
+    # use temporary community build of py13 wheel, use until official project build
+    # uv pip install https://github.com/anthonywu/sentencepiece/releases/download/0.2.1-py13dev/sentencepiece-0.2.1-cp313-cp313-macosx_11_0_arm64.whl
     "sentencepiece>=0.2.0,<1.0; python_version<'3.13'",
     "tokenizers>=0.20.3; python_version>='3.13'",  # transformers -> tokenizers
     "torch>=2.3.1,<3.0; python_version<'3.13'",