diff --git a/README.md b/README.md
index 2e1213c..c79791e 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Discover:
 ## OpenLayers compatibility
 
 - OL < 8: use version 0.0.8
-- OL 8: use version >= 0.1.0
+- OL 8 & 9: use version >= 0.1.0
 
 ## Install
 
diff --git a/index.html b/index.html
index 9b5f8b1..c869885 100644
--- a/index.html
+++ b/index.html
@@ -4,9 +4,9 @@
     <meta charset="utf-8" />
     <title>Map with indoor=</title>
     <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
-    <script src="https://cdn.jsdelivr.net/npm/ol@v8.1.0/dist/ol.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/ol@v9.1.0/dist/ol.js"></script>
     <script src="./dist/openlayers-indoorequal.umd.min.js"></script>
-    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@v8.1.0/ol.css">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@9.1.0/ol.css">
     <link href="./openlayers-indoorequal.css" rel="stylesheet" />
     <style>
       body { margin: 0; padding: 0; }
diff --git a/package.json b/package.json
index 3d3e31d..e7f3a50 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "documentation": "^14.0.3",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
-    "ol": "^8.2.0",
+    "ol": "^9.1.0",
     "rollup": "^4.14.0"
   },
   "packageManager": "yarn@3.6.0"
diff --git a/yarn.lock b/yarn.lock
index 07c32b5..44f8016 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6130,9 +6130,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ol@npm:^8.2.0":
-  version: 8.2.0
-  resolution: "ol@npm:8.2.0"
+"ol@npm:^9.1.0":
+  version: 9.1.0
+  resolution: "ol@npm:9.1.0"
   dependencies:
     color-rgba: ^3.0.0
     color-space: ^2.0.1
@@ -6140,7 +6140,7 @@ __metadata:
     geotiff: ^2.0.7
     pbf: 3.2.1
     rbush: ^3.0.1
-  checksum: 66dff76569ef8923c45ebbffefb37555c7f8767a4d482a16f8624566df712cbc69a912abfa3e7ecbab7c7847df674797d38c117c93b09ca45dc2fc6139aea815
+  checksum: 09b4dc4daa780a0d613d52378b39afb0645ac67635a39524e1d2176b78c3a31cce31a268bd3eeb37cc45d3015dadea5ee0d5f76f12d311a6120e62eb4498152a
   languageName: node
   linkType: hard
 
@@ -6178,7 +6178,7 @@ __metadata:
     documentation: ^14.0.3
     jest: ^29.7.0
     jest-environment-jsdom: ^29.7.0
-    ol: ^8.2.0
+    ol: ^9.1.0
     rollup: ^4.14.0
   peerDependencies:
     ol: ^8.0.0