diff --git a/package-lock.json b/package-lock.json
index ed642c4ac0..c04f15db67 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ol",
-  "version": "6.9.0",
+  "version": "6.9.1-dev",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "ol",
-      "version": "6.9.0",
+      "version": "6.9.1-dev",
       "license": "BSD-2-Clause",
       "dependencies": {
         "geotiff": "^1.0.8",
diff --git a/package.json b/package.json
index 702b2a94d2..a83fedf8d5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "6.9.0",
+  "version": "6.9.1-dev",
   "description": "OpenLayers mapping library",
   "keywords": [
     "map",