diff --git a/package-lock.json b/package-lock.json
index fed2d0cc4b..6d0086df5b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "6.4.1",
+  "version": "6.4.2-dev",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 2a48b8fd76..fa89d4cc50 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "6.4.1",
+  "version": "6.4.2-dev",
   "description": "OpenLayers mapping library",
   "keywords": [
     "map",