diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8df061a..381d64f8 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]
 
+## [3.6.0] - 2026-06-29
+
 ### Added
 - **`LPDiD` (Local Projections Difference-in-Differences; Dube, Girardi, Jordà & Taylor 2025,
   *J. Applied Econometrics* 40(5):741-758).** Per-horizon long-difference OLS
@@ -1794,6 +1796,7 @@ 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
+[3.6.0]: 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
 [3.5.1]: https://github.com/igerber/diff-diff/compare/v3.5.0...v3.5.1
diff --git a/CITATION.cff b/CITATION.cff
index f64a0289..5d6de53b 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: "3.5.3"
-date-released: "2026-06-25"
+version: "3.6.0"
+date-released: "2026-06-29"
 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 3796754e..0058e752 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -301,7 +301,7 @@
 DCDH = ChaisemartinDHaultfoeuille
 HAD = HeterogeneousAdoptionDiD
 
-__version__ = "3.5.3"
+__version__ = "3.6.0"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/diff_diff/guides/llms-full.txt b/diff_diff/guides/llms-full.txt
index c63441b7..79349a74 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: 3.5.3
+- Version: 3.6.0
 - 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 52e1308f..1c2f11a2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "3.5.3"
+version = "3.6.0"
 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 2e125876..b94b153c 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "3.5.3"
+version = "3.6.0"
 edition = "2021"
 rust-version = "1.85"
 description = "Rust backend for diff-diff DiD library"