diff --git a/src/Pages/Authentication/index.js b/src/Pages/Authentication/index.js
index 18565b6..b30cf93 100644
--- a/src/Pages/Authentication/index.js
+++ b/src/Pages/Authentication/index.js
@@ -83,11 +83,7 @@ function PrivacyPolicyCheckbox() {
   const { t } = useTranslation();
 
   const link = (
-    <a
-      href={process.env.REACT_APP_PRIVACY_POLICY_URL}
-      target="_blank"
-      rel="noreferrer"
-    />
+    <a href={Constants.PRIVACY_POLICY_URL} target="_blank" rel="noreferrer" />
   );
 
   return (
diff --git a/src/utils.js b/src/utils.js
index b5f06d9..be79aaa 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -33,9 +33,10 @@ export const Constants = {
   API_ADDRESS: apiAddress,
   //STATIC_CONTENT_ADDRESS: staticContentAddress,
   // WS_ADDRESS: wsAddress,
-  EMBED_CALENDAR_ADDRESS: "https://calendar.ex.umbach.dev/embed/?id=",
+  EMBED_CALENDAR_ADDRESS: process.env.REACT_APP_EMBED_CALENDAR_ADDRESS,
   EMBED_CALENDAR_SCRIPT_ADDRESS:
-    "https://calendar.ex.umbach.dev/embedPopup/script.js",
+    process.env.REACT_APP_EMBED_CALENDAR_SCRIPT_ADDRESS,
+  PRIVACY_POLICY_URL: process.env.REACT_APP_PRIVACY_POLICY_URL,
   ROUTE_PATHS: {
     AUTHENTICATION: {
       LOGIN: "/login",
@@ -82,7 +83,7 @@ export const Constants = {
     MAX_COMPANY_NAME_LENGTH: 64,
   },
   DELAY_ACCOUNT_NAME_CHECK: 250,
-  CLARITY_PROJECT_ID: "kr0pale8uy",
+  CLARITY_PROJECT_ID: process.env.REACT_APP_CLARITY_PROJECT_ID,
   ACCOUNT_DELETED_AFTER_DAYS: 30,
   ACCOUNT_STATE: {
     ACTIVE: 0,
@@ -90,7 +91,7 @@ export const Constants = {
     INIT_LOGGING: 2,
     BANNED: 3,
   },
-  SUPPORT_EMAIL: "support@zeitadler.de",
+  SUPPORT_EMAIL: process.env.REACT_APP_SUPPORT_EMAIL,
 };
 
 export const AppStyle = {