diff --git a/package.json b/package.json
index e05d8a22..ce89f8aa 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hipo/react-ui-toolkit",
-  "version": "1.0.0-alpha.5.3.0",
+  "version": "1.0.0-alpha.5.3.1",
   "description": "React based UI toolkit.",
   "main": "dist/index.js",
   "scripts": {
diff --git a/src/core/utils/device/deviceUtils.ts b/src/core/utils/device/deviceUtils.ts
index 6059b044..46132b1c 100644
--- a/src/core/utils/device/deviceUtils.ts
+++ b/src/core/utils/device/deviceUtils.ts
@@ -1,5 +1,7 @@
 function isMobileDevice() {
-  const userAgent = navigator.userAgent || navigator.vendor;
+  const userAgent =
+    // eslint-disable-next-line no-negated-condition
+    typeof navigator !== "undefined" ? navigator.userAgent || navigator.vendor : "";
   const devices = [/Android/i, /iPhone/i, /iPad/i];
 
   return devices.some((device) => userAgent.match(device));
diff --git a/src/core/utils/number/numberUtils.ts b/src/core/utils/number/numberUtils.ts
index 5ca7c916..4346920b 100644
--- a/src/core/utils/number/numberUtils.ts
+++ b/src/core/utils/number/numberUtils.ts
@@ -1,6 +1,8 @@
 import {FormatNumberOptions, ParseNumberOptions} from "./numberTypes";
 
-const NAVIGATOR_LANGUAGE = typeof navigator !== "undefined" ? navigator.language : "en-GB";
+const NAVIGATOR_LANGUAGE =
+  // eslint-disable-next-line no-negated-condition
+  typeof navigator !== "undefined" ? navigator.language : "en-GB";
 
 function formatNumber(formatNumberOptions: FormatNumberOptions) {
   const {locale, ...otherOptions} = formatNumberOptions;