diff --git a/app/logic/build.ts b/app/logic/build.ts
index ef4a7a943..2ee3d54a7 100644
--- a/app/logic/build.ts
+++ b/app/logic/build.ts
@@ -1,6 +1,6 @@
 /** Quick and dirty way to change the build. */
 /* Changed by ../build/parula-brand.sh . That's also why we use '' quotes here. */
 export const production = false;
-export const appVersion: string = '0.6.21-dev';
+export const appVersion: string = '0.6.21';
 export const appName: string = 'Mustang';
 export const siteRoot: string = 'https://mustang.im';
diff --git a/app/package.json b/app/package.json
index e644dc4ee..0b7b62fac 100644
--- a/app/package.json
+++ b/app/package.json
@@ -2,7 +2,7 @@
   "name": "mustang-frontend",
   "description": "Mustang UI",
   "private": true,
-  "version": "0.6.21-dev",
+  "version": "0.6.21",
   "scripts": {
     "dev": "npm run l10n:compile && vite",
     "build": "npm run l10n:compile && vite build",
diff --git a/e2/package.json b/e2/package.json
index 58bc54568..7c7f1195d 100644
--- a/e2/package.json
+++ b/e2/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mustang",
-  "version": "0.6.21-dev",
+  "version": "0.6.21",
   "description": "Mustang - Video conference, chat, mail, calendar, files, contacts",
   "main": "./out/main/index.js",
   "type": "module",