diff --git a/package.json b/package.json
index 9bbf631..0bd65b3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@vaadin/vaadin-upload",
-  "version": "4.3.0",
+  "version": "4.4.0-alpha1",
   "description": "Web Component for uploading files with drag and drop support",
   "main": "vaadin-upload.html",
   "repository": "vaadin/vaadin-upload",
diff --git a/src/vaadin-upload.html b/src/vaadin-upload.html
index 5f77dc1..f867f31 100644
--- a/src/vaadin-upload.html
+++ b/src/vaadin-upload.html
@@ -103,7 +103,7 @@
         }
 
         static get version() {
-          return '4.3.0';
+          return '4.4.0-alpha1';
         }
 
         static get properties() {