diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8452675..7cdde2cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to
 
 ## [Unreleased]
 
+## [v3.1.8] - 2022-10-04
+
 ### Fixed
 - Rounding to order of magnitude (see issue
   [\#622](https://github.com/josephwright/siunitx/issues/622))
@@ -1815,7 +1817,8 @@ Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to
 ### Added
 - First public testing release (as `si`)
 
-[Unreleased]: https://github.com/josephwright/siunitx/compare/v3.1.7...HEAD
+[Unreleased]: https://github.com/josephwright/siunitx/compare/v3.1.8...HEAD
+[v3.1.8]: https://github.com/josephwright/siunitx/compare/v3.1.7...v3.1.8
 [v3.1.7]: https://github.com/josephwright/siunitx/compare/v3.1.6...v3.1.7
 [v3.1.6]: https://github.com/josephwright/siunitx/compare/v3.1.5...v3.1.6
 [v3.1.5]: https://github.com/josephwright/siunitx/compare/v3.1.4...v3.1.5
diff --git a/siunitx.dtx b/siunitx.dtx
index 13a76da6..3e61bbb8 100644
--- a/siunitx.dtx
+++ b/siunitx.dtx
@@ -121,7 +121,7 @@
 %
 % Identify the package and give the over all version information.
 %    \begin{macrocode}
-\ProvidesExplPackage {siunitx} {2022-09-07} {3.1.7}
+\ProvidesExplPackage {siunitx} {2022-10-04} {3.1.8}
   {A comprehensive (SI) units package}
 %    \end{macrocode}
 %