diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85fd256..57e6841 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## 0.3.1 — 2026-09-21
 
 - **Fixed (changes results):** missing and infinite values no longer produce
   plausible-looking numbers. Previously one NaN made `permutation.compute`
diff --git a/entroscope/__init__.py b/entroscope/__init__.py
index 413d809..0e8e328 100644
--- a/entroscope/__init__.py
+++ b/entroscope/__init__.py
@@ -13,7 +13,7 @@
 )
 from .utils import plot
 
-__version__ = "0.3.0"
+__version__ = "0.3.1"
 __all__ = [
     "approximate",
     "differential",
diff --git a/pyproject.toml b/pyproject.toml
index 1d37734..e7a6c7a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "entroscope"
-version = "0.3.0"
+version = "0.3.1"
 description = "The definitive entropy toolkit for time series data"
 readme = "README.md"
 requires-python = ">=3.9"