diff --git a/CHANGELOG.md b/CHANGELOG.md
index d7b76b9a..7672ec82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.0.1] - 2026-04-07
+
+### Added
+- **`aggregate_survey()`** — new function in `diff_diff.prep` that bridges individual-level survey microdata to geographic-period panels for DiD estimation. Computes design-based cell means and precision weights using domain estimation (Lumley 2004), with SRS fallback for small cells. Returns a panel DataFrame and pre-configured `SurveyDesign` for second-stage estimation. Supports both TSL and replicate-weight variance.
+- **Python 3.14 support** — upgraded PyO3 from 0.22 to 0.28, updated CI and publish workflow matrices, bumped Rust MSRV to 1.84 for faer 0.24 compatibility.
+
+### Changed
+- Updated README Python support matrix to include 3.14
+
+### Fixed
+- Fix domain estimation zero-padding for correct design-based cell variance
+- Fix SRS fallback weight normalization for scale invariance across replicate designs
+- Validate numeric dtype for outcomes/covariates before aggregation (nullable dtype support)
+- Validate grouping columns for NaN values
+
 ## [3.0.0] - 2026-04-07
 
 v3.0 completes the survey support roadmap: all 16 estimators (15 inference-level +
@@ -1197,6 +1212,8 @@ for the full feature history leading to this release.
   - `to_dict()` and `to_dataframe()` export methods
   - `is_significant` and `significance_stars` properties
 
+[3.0.1]: https://github.com/igerber/diff-diff/compare/v3.0.0...v3.0.1
+[3.0.0]: https://github.com/igerber/diff-diff/compare/v2.9.1...v3.0.0
 [2.9.1]: https://github.com/igerber/diff-diff/compare/v2.9.0...v2.9.1
 [2.9.0]: https://github.com/igerber/diff-diff/compare/v2.8.4...v2.9.0
 [2.8.4]: https://github.com/igerber/diff-diff/compare/v2.8.3...v2.8.4
diff --git a/diff_diff/__init__.py b/diff_diff/__init__.py
index 4be7dd26..41ec6445 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -215,7 +215,7 @@
 EDiD = EfficientDiD
 ETWFE = WooldridgeDiD
 
-__version__ = "3.0.0"
+__version__ = "3.0.1"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/docs/llms-full.txt b/docs/llms-full.txt
index 9f127858..5a624fa2 100644
--- a/docs/llms-full.txt
+++ b/docs/llms-full.txt
@@ -2,7 +2,7 @@
 
 > A Python library for Difference-in-Differences causal inference analysis. Provides sklearn-like estimators with statsmodels-style output for econometric analysis.
 
-- Version: 3.0.0
+- Version: 3.0.1
 - Repository: https://github.com/igerber/diff-diff
 - License: MIT
 - Dependencies: numpy, pandas, scipy (no statsmodels dependency)
diff --git a/pyproject.toml b/pyproject.toml
index 38ac4704..db8865d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "3.0.0"
+version = "3.0.1"
 description = "Difference-in-Differences causal inference with sklearn-like API. Callaway-Sant'Anna, Synthetic DiD, Honest DiD, event studies, parallel trends."
 readme = "README.md"
 license = "MIT"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 67426d09..517b6e0b 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "3.0.0"
+version = "3.0.1"
 edition = "2021"
 rust-version = "1.84"
 description = "Rust backend for diff-diff DiD library"