diff --git a/package-lock.json b/package-lock.json
index 1b6ee9ae30..30c7d83bb5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "6.4.3",
+  "version": "6.4.4-dev",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 1bcee0fbe7..c7ec01a591 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "6.4.3",
+  "version": "6.4.4-dev",
   "description": "OpenLayers mapping library",
   "keywords": [
     "map",