diff --git a/src/lib/env.mjs b/src/lib/env.mjs
index cf2d70e..35168a1 100644
--- a/src/lib/env.mjs
+++ b/src/lib/env.mjs
@@ -9,7 +9,7 @@ export const env = createEnv({
     SL_DB_URL : z.string().min(1),
     DB_AUTH_TOKEN: z.string().optional(),
     NEXTAUTH_URL: z.string().optional(),
-    NEXTAUTH_URL_INTERNAL: z.string(),
+    NEXTAUTH_URL_INTERNAL: z.string().optional(),
     NEXTAUTH_SECRET: z.string(),
     AUTH_STEAM_SECRET: z.string(),
   },