diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5496fa2..a1c627e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 1.4.0 (2026-09-01)
+
 ### New Features
 
 - feat: Add the `cell-output` option. The output of an executed cell is no longer framed, and `cell-output: true` frames it again. (#39)
diff --git a/CITATION.cff b/CITATION.cff
index fbaa4e6..4459761 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -9,5 +9,5 @@ authors:
 repository-code: "https://github.com/mcanouil/quarto-code-window"
 url: "https://m.canouil.dev/quarto-code-window/"
 license: "MIT License"
-date-released: "2026-08-02"
-version: 1.3.3
+date-released: "2026-09-01"
+version: 1.4.0
diff --git a/README.md b/README.md
index aece2f4..7728f95 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ## Installation
 
 ```bash
-quarto add mcanouil/quarto-code-window@1.3.3
+quarto add mcanouil/quarto-code-window@1.4.0
 ```
 
 This will install the extension under the `_extensions` subdirectory.
diff --git a/_extensions/code-window/_extension.yml b/_extensions/code-window/_extension.yml
index 1cff8f6..1f241b3 100644
--- a/_extensions/code-window/_extension.yml
+++ b/_extensions/code-window/_extension.yml
@@ -1,6 +1,6 @@
 title: Code Window
 author: Mickaël Canouil
-version: 1.3.3
+version: 1.4.0
 quarto-required: ">=1.9.36"
 contributes:
   filters: