TypeError in Cython code on numba==0.63.1 and causalml==0.15.4

[CloseChoice]

Describe the bug
When importing causalml.dataset on the 0.15.4 release we are experiencing the following failure:

TypeError: C variable sklearn.utils._random.DEFAULT_SEED has wrong signature (expected __pyx_t_7sklearn_5utils_9_typedefs_uint32_t, got __pyx_t_7sklearn_5utils_9_typedefs_uint32_t const )

To Reproduce
Steps to reproduce the behavior:

# uv pip install numba==0.63.1
# uv pip install causalml==0.15.4   # order matters here!
import causalml.dataset

Expected behavior
Should pass

Environment (please complete the following information):

• OS: Ubuntu, MacOS
• Python Version: 3.13, 3.14
• Versions of Major Dependencies: pandas==2.3.3, scikit-learn==1.8.0, cython==3.2.2

Additional context
We experience this in the SHAP pipelines: https://github.com/shap/shap/actions/runs/20113311832/job/57716416017#step:11:15.
We could also upgrade to the latest release of causalml if that supports scipy>=1.16 (a requirement of ours), since the bug seems to be fixed on causalml==0.15.5

[jeongyoonlee]

Thanks for submitting the issue, @CloseChoice. The scipy<1.16 dependency requirement was meant to be temporary due to the issue with statsmodels. It seems it was resolved with https://github.com/statsmodels/statsmodels/releases/tag/v0.14.5. I will unpin the scipy dependency so that the latest causalml can support scipy>=1.16.

[CloseChoice]

thanks, any plans for an upcoming release?

[jeongyoonlee]

We have a PR for the release waiting for a review. As soon as it’s merged, we will release it.

…

On Sun, Feb 1, 2026 at 1:45 PM Tobias Pitters ***@***.***> wrote: *CloseChoice* left a comment (uber/causalml#859) <#859 (comment)> thanks, any plans for an upcoming release? — Reply to this email directly, view it on GitHub <#859 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAZUJDYBAA4IZ6GPKLKJYQD4JZXWDAVCNFSM6AAAAACOXI7OV6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTQMZSGEYTKMRTGI> . You are receiving this because you modified the open/close state.Message ID: ***@***.***>

[jeongyoonlee]

Reopening this because we couldn't release the new version yet due to the Ubuntu packaging failure: https://github.com/uber/causalml/actions/runs/21578483440/job/62170793325

We will look into it.

[jeongyoonlee]

Hi @CloseChoice, CausalML v0.16.0 has been released with the latest dependency updates (#869). Can you try it again?