diff --git a/lib/env.ts b/lib/env.ts
index ae79f6e..911759b 100644
--- a/lib/env.ts
+++ b/lib/env.ts
@@ -12,11 +12,11 @@ function getOptionalEnv(name: string): string | undefined {
 }
 
 export const env = {
-  APP_URL: getRequiredEnv("APP_URL"),
-  KEYCLOAK_BASE_URL: getRequiredEnv("KEYCLOAK_BASE_URL"),
-  KEYCLOAK_REALM: getRequiredEnv("KEYCLOAK_REALM"),
-  KEYCLOAK_CLIENT_ID: getRequiredEnv("KEYCLOAK_CLIENT_ID"),
-  KEYCLOAK_CLIENT_SECRET: getRequiredEnv("KEYCLOAK_CLIENT_SECRET"),
-  API_URL: getRequiredEnv("API_URL"),
-  COOKIE_DOMAIN: getOptionalEnv("COOKIE_DOMAIN"),
+  APP_URL: getRequiredEnv("APP_URL") as string,
+  KEYCLOAK_BASE_URL: getRequiredEnv("KEYCLOAK_BASE_URL") as string,
+  KEYCLOAK_REALM: getRequiredEnv("KEYCLOAK_REALM") as string,
+  KEYCLOAK_CLIENT_ID: getRequiredEnv("KEYCLOAK_CLIENT_ID") as string,
+  KEYCLOAK_CLIENT_SECRET: getRequiredEnv("KEYCLOAK_CLIENT_SECRET") as string,
+  API_URL: getRequiredEnv("API_URL") as string,
+  COOKIE_DOMAIN: getOptionalEnv("COOKIE_DOMAIN") as string,
 };