diff --git a/CHANGELOG.md b/CHANGELOG.md
index 347c8718..d6043e05 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.6.1] - 2026-07-01
+
 ### Added
 - **`LPDiD` complex-survey-design support** (Phase D1). Adds a `survey_design=` argument to
   `LPDiD.fit()` (a `SurveyDesign` with probability weights + optional strata/PSU/FPC). On the
@@ -1914,6 +1916,7 @@ for the full feature history leading to this release.
 [2.1.2]: https://github.com/igerber/diff-diff/compare/v2.1.1...v2.1.2
 [2.1.1]: https://github.com/igerber/diff-diff/compare/v2.1.0...v2.1.1
 [2.1.0]: https://github.com/igerber/diff-diff/compare/v2.0.3...v2.1.0
+[3.6.1]: https://github.com/igerber/diff-diff/compare/v3.6.0...v3.6.1
 [3.6.0]: https://github.com/igerber/diff-diff/compare/v3.5.3...v3.6.0
 [3.5.3]: https://github.com/igerber/diff-diff/compare/v3.5.2...v3.5.3
 [3.5.2]: https://github.com/igerber/diff-diff/compare/v3.5.1...v3.5.2
diff --git a/CITATION.cff b/CITATION.cff
index 5d6de53b..18057ee3 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -7,8 +7,8 @@ authors:
     family-names: Gerber
     orcid: "https://orcid.org/0009-0009-3275-5591"
 license: MIT
-version: "3.6.0"
-date-released: "2026-06-29"
+version: "3.6.1"
+date-released: "2026-07-01"
 doi: "10.5281/zenodo.19646175"
 url: "https://github.com/igerber/diff-diff"
 repository-code: "https://github.com/igerber/diff-diff"
diff --git a/diff_diff/__init__.py b/diff_diff/__init__.py
index 0058e752..b247b4dd 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -301,7 +301,7 @@
 DCDH = ChaisemartinDHaultfoeuille
 HAD = HeterogeneousAdoptionDiD
 
-__version__ = "3.6.0"
+__version__ = "3.6.1"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/diff_diff/guides/llms-full.txt b/diff_diff/guides/llms-full.txt
index 6de24848..fcf96f86 100644
--- a/diff_diff/guides/llms-full.txt
+++ b/diff_diff/guides/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: 3.6.0
+- Version: 3.6.1
 - 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 1c2f11a2..c3396288 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "3.6.0"
+version = "3.6.1"
 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 b94b153c..16dae3c5 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "3.6.0"
+version = "3.6.1"
 edition = "2021"
 rust-version = "1.85"
 description = "Rust backend for diff-diff DiD library"