diff --git a/src/lib/api.ts b/src/lib/api.ts
index 7f159e1..9d60654 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -2,7 +2,7 @@
  * API client for Team Board BFF.
  */
 
-const API_BASE = process.env.NEXT_PUBLIC_API_URL || "https://team.uix.su";
+const API_BASE = process.env.NEXT_PUBLIC_API_URL!; // Required — set in .env.local
 
 function getToken(): string | null {
   if (typeof window === "undefined") return null;
diff --git a/src/lib/ws.ts b/src/lib/ws.ts
index aa9cf07..746260b 100644
--- a/src/lib/ws.ts
+++ b/src/lib/ws.ts
@@ -22,7 +22,11 @@ class WSClient {
     const token = localStorage.getItem("tb_token");
     if (!token) return;
 
-    const wsBase = process.env.NEXT_PUBLIC_WS_URL || "wss://team.uix.su";
+    const wsBase = process.env.NEXT_PUBLIC_WS_URL;
+    if (!wsBase) {
+      console.error("NEXT_PUBLIC_WS_URL is not set!");
+      return;
+    }
     this.ws = new WebSocket(`${wsBase}/ws?token=${token}`);
 
     this.ws.onmessage = (event) => {