diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..6971184
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,14 @@
+# Changelog
+
+### 1.0.1 - 2024-01-20
+
+- Resolved PHP errors that occurred when attempting to create a new Prefix tag in the ACP with an empty input field.
+- Addressed an issue where editing posts and switching between Prefix or no Prefix now ensures that all Reply posts are updated with the correct Prefix upon form submission.
+- Fixed the behavior where, during post preview, the selected Prefix remains chosen in the posting form.
+- Updated the prefix's Enable/Disable toggle to a more user-friendly graphical UI switch.
+- Eliminated deprecated jQuery commands.
+- Various internal code improvements.
+
+### 1.0.0 - 2018-12-24
+
+- First release
diff --git a/composer.json b/composer.json
index a88adc8..7013feb 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
 	"type": "phpbb-extension",
 	"description": "An official phpBB extension for topic prefixes.",
 	"homepage": "https://www.phpbb.com/customise/db/extension/topicprefixes/",
-	"version": "1.0.1-dev",
+	"version": "1.0.1",
 	"license": "GPL-2.0-only",
 	"authors": [
 		{