diff --git a/CHANGES.md b/CHANGES.md
index b4f75cb9e..daa6de330 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,7 @@
 * Changes
   * Convert all image WMS sources regardless of their load functions
   * Allow to force a specific tileLoadFunction using the olcs\_tileLoadFunction property
+  * Test with OL 9.1
 
 * Breaking changes
   * Rename all 'olcs.xx' properties to 'olcs\_xx' and document them in PROPERTIES.md
diff --git a/package-lock.json b/package-lock.json
index 2c1c4ffbc..f9f410495 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "eslint-config-openlayers": "12.0.0",
         "eslint-import-resolver-typescript": "3.6.1",
         "eslint-plugin-import": "2.29.1",
-        "ol": "9.0.0",
+        "ol": "9.1.0",
         "parcel": "2.12.0",
         "proj4": "2.11.0",
         "recast": "0.23.6",
@@ -5859,9 +5859,9 @@
       }
     },
     "node_modules/ol": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/ol/-/ol-9.0.0.tgz",
-      "integrity": "sha512-+nYHZYbHrRUTDJ8ryxXPdDoAiaT6Zea02cocmGqsJXs4Oac1fYC9EbTIU2Y7803QcmG3u2MR88RxbksBvK+ZfQ==",
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/ol/-/ol-9.1.0.tgz",
+      "integrity": "sha512-nDrkJ2tzZNpo/wzN/PpHV5zdxbnXZaFktoMaD2cFLEc6gCwlgLY21Yd8wnt/4FjaVYwLBnbN9USXSwIBGcyksQ==",
       "dev": true,
       "dependencies": {
         "color-rgba": "^3.0.0",
diff --git a/package.json b/package.json
index e5309977a..9505d4397 100644
--- a/package.json
+++ b/package.json
@@ -86,7 +86,7 @@
     "eslint-config-openlayers": "12.0.0",
     "eslint-import-resolver-typescript": "3.6.1",
     "eslint-plugin-import": "2.29.1",
-    "ol": "9.0.0",
+    "ol": "9.1.0",
     "parcel": "2.12.0",
     "proj4": "2.11.0",
     "recast": "0.23.6",