diff --git a/CHANGELOG.md b/CHANGELOG.md
index e1c88f5ce..fb6b9b793 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [3.8.0] - 2026-07-18
 
 ### Added
 - **`RegressionDiscontinuity` - sharp, fuzzy, AND covariate-adjusted regression
@@ -3158,6 +3158,7 @@ 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
+[3.8.0]: https://github.com/igerber/diff-diff/compare/v3.7.0...v3.8.0
 [3.7.0]: https://github.com/igerber/diff-diff/compare/v3.6.2...v3.7.0
 [3.6.2]: https://github.com/igerber/diff-diff/compare/v3.6.1...v3.6.2
 [3.6.1]: https://github.com/igerber/diff-diff/compare/v3.6.0...v3.6.1
diff --git a/CITATION.cff b/CITATION.cff
index df01d22a2..e5f98a753 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: "3.7.0"
-date-released: "2026-07-08"
+version: "3.8.0"
+date-released: "2026-07-18"
 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 f2319ef49..f97bdcf11 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -316,7 +316,7 @@
 CiC = ChangesInChanges
 RDD = RegressionDiscontinuity
 
-__version__ = "3.7.0"
+__version__ = "3.8.0"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/diff_diff/guides/llms-full.txt b/diff_diff/guides/llms-full.txt
index 93fefd88b..615d71c68 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: 3.7.0
+- Version: 3.8.0
 - 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 be534c754..bd908d318 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "3.7.0"
+version = "3.8.0"
 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 edf2d06d6..cfa04e71b 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "3.7.0"
+version = "3.8.0"
 edition = "2021"
 rust-version = "1.85"
 description = "Rust backend for diff-diff DiD library"