diff --git a/package.json b/package.json
index c3e3de7..b40a88f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kangaroo-and-rabbit/kar-cw",
-  "version": "0.4.0",
+  "version": "0.4.0-dev",
   "sideEffects": false,
   "scripts": {
     "dev": "ng build kar-cw --watch --configuration development",
diff --git a/version.txt b/version.txt
index 1d0ba9e..25a5afd 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.4.0
+0.4.0-dev