diff --git a/backend/btrixcloud/version.py b/backend/btrixcloud/version.py
index 8720c97b..1900d065 100644
--- a/backend/btrixcloud/version.py
+++ b/backend/btrixcloud/version.py
@@ -1,2 +1,2 @@
 """ current version """
-__version__ = "1.3.1"
+__version__ = "1.4.0-beta.0"
diff --git a/frontend/package.json b/frontend/package.json
index e04f43ff..1c7fdfbd 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "browsertrix-frontend",
-  "version": "1.3.1",
+  "version": "1.4.0-beta.0",
   "main": "index.ts",
   "license": "AGPL-3.0-or-later",
   "dependencies": {
diff --git a/version.txt b/version.txt
index 3a3cd8cc..c431216b 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.3.1
+1.4.0-beta.0