diff --git a/package-lock.json b/package-lock.json
index ba01b97fb2..37a3aad7eb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "6.4.2",
+  "version": "6.4.3-dev",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index b5754cd5ed..def4033b46 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "6.4.2",
+  "version": "6.4.3-dev",
   "description": "OpenLayers mapping library",
   "keywords": [
     "map",