diff --git a/.changelog/current/2682-fix-typescript.md b/.changelog/current/2682-fix-typescript.md
new file mode 100644
index 000000000..e56de39a1
--- /dev/null
+++ b/.changelog/current/2682-fix-typescript.md
@@ -0,0 +1,3 @@
+# Fixed
+
+- Typescript error during building of app frontend
diff --git a/package-lock.json b/package-lock.json
index 27c4329bb..342e382ac 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
         "@nextcloud/event-bus": "^3.1.0",
         "@nextcloud/moment": "^1.2.2",
         "@nextcloud/router": "^3.0.1",
+        "@nextcloud/typings": "^1.9.1",
         "@nextcloud/vue": "^8.3.0",
         "caret-pos": "^2.0.0",
         "fuse.js": "^7.0.0",
diff --git a/package.json b/package.json
index 9edf56711..04755abf6 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "@nextcloud/event-bus": "^3.1.0",
     "@nextcloud/moment": "^1.2.2",
     "@nextcloud/router": "^3.0.1",
+    "@nextcloud/typings": "^1.9.1",
     "@nextcloud/vue": "^8.3.0",
     "caret-pos": "^2.0.0",
     "fuse.js": "^7.0.0",
diff --git a/src/guest.ts b/src/guest.ts
index 75dbcf265..7ce32a605 100644
--- a/src/guest.ts
+++ b/src/guest.ts
@@ -5,6 +5,8 @@
  * @license AGPL3 or later
  */
 
+/// <reference types="@nextcloud/typings" />
+
 import Vue from 'vue';
 
 import { useStore } from './store';
@@ -14,7 +16,12 @@ import AppInvalidGuest from './components/AppInvalidGuest.vue';
 declare global {
 	interface Window {
 		// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		OC: any;
+		OC:
+			| Nextcloud.v16.OC
+			| Nextcloud.v17.OC
+			| Nextcloud.v18.OC
+			| Nextcloud.v19.OC
+			| Nextcloud.v20.OC;
 		n: string;
 		t: string;
 	}
diff --git a/src/main.ts b/src/main.ts
index d377bd4f2..b5f9ba056 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -5,6 +5,8 @@
  * @license AGPL3 or later
  */
 
+/// <reference types="@nextcloud/typings" />
+
 // Markdown
 import VueShowdown from 'vue-showdown';
 
@@ -24,7 +26,12 @@ import AppMain from './components/AppMain.vue';
 declare global {
 	interface Window {
 		// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		OC: any;
+		OC:
+			| Nextcloud.v16.OC
+			| Nextcloud.v17.OC
+			| Nextcloud.v18.OC
+			| Nextcloud.v19.OC
+			| Nextcloud.v20.OC;
 		n: string;
 		t: string;
 		escapeHTML(text: string): string;