diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96be79e..36dc15a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## v3.1.2 - 2024-12-23
+
 ### Changed
 
 - Upgrade Node.js LTS and dependent packages to the latest version ([#405](https://github.com/marp-team/marpit/pull/405))
diff --git a/package-lock.json b/package-lock.json
index 33bfad2..43b38b1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@marp-team/marpit",
-  "version": "3.1.1",
+  "version": "3.1.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@marp-team/marpit",
-      "version": "3.1.1",
+      "version": "3.1.2",
       "license": "MIT",
       "dependencies": {
         "@csstools/postcss-is-pseudo-class": "^5.0.1",
diff --git a/package.json b/package.json
index 72b12ba..101ec75 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@marp-team/marpit",
-  "version": "3.1.1",
+  "version": "3.1.2",
   "description": "The skinny framework for creating slide deck from Markdown",
   "license": "MIT",
   "author": {