diff --git a/apps/web/src/lib/env/web.ts b/apps/web/src/lib/env/web.ts
index 4e8b550e..591b36ad 100644
--- a/apps/web/src/lib/env/web.ts
+++ b/apps/web/src/lib/env/web.ts
@@ -11,10 +11,11 @@ const webEnvSchema = z.object({
 	NEXT_PUBLIC_MARBLE_API_URL: z.url(),
 
 	// Server
-	DATABASE_URL: z
-		.string()
-		.startsWith("postgres://")
-		.or(z.string().startsWith("postgresql://")),
+	DATABASE_URL: z.string().refine(
+		(url) =>
+			url.startsWith("postgres://") || url.startsWith("postgresql://"),
+		"DATABASE_URL must be a postgres:// or postgresql:// URL",
+	),
 
 	BETTER_AUTH_SECRET: z.string(),
 	UPSTASH_REDIS_REST_URL: z.url(),