diff --git a/health-agent/scripts/setup_uptime_kuma.py b/health-agent/scripts/setup_uptime_kuma.py
index 8a9294e..985f5d5 100644
--- a/health-agent/scripts/setup_uptime_kuma.py
+++ b/health-agent/scripts/setup_uptime_kuma.py
@@ -261,6 +261,7 @@ def setup_uptime_kuma(dry_run=False, only=None):
                     "hostname": hostname,
                     "port": 53,
                     "accepted_statuscodes": ["200-299"],
+                    "dns_resolve_server": "1.1.1.1",
                     "dns_resolve_type": dns_resolve_type,
                     "interval": interval,
                 }
@@ -280,6 +281,7 @@ def setup_uptime_kuma(dry_run=False, only=None):
                         "hostname": hostname,
                         "port": 53,
                         "accepted_statuscodes": ["200-299"],
+                        "dns_resolve_server": "1.1.1.1",
                         "dns_resolve_type": dns_resolve_type,
                         "interval": interval,
                     }
diff --git a/health-agent/src/health_agent/checks/http.py b/health-agent/src/health_agent/checks/http.py
index 5191392..257d721 100644
--- a/health-agent/src/health_agent/checks/http.py
+++ b/health-agent/src/health_agent/checks/http.py
@@ -140,11 +140,14 @@ def check_vault():
         max_ping = max(max_ping, ms)
         
         if resp is not None:
-            data = resp.json()
-            if not data.get("sealed"):
-                unsealed_count += 1
-            else:
-                errors.append(f"{node} SEALED")
+            try:
+                data = resp.json()
+                if not data.get("sealed"):
+                    unsealed_count += 1
+                else:
+                    errors.append(f"{node} SEALED")
+            except Exception as e:
+                errors.append(f"{node} invalid response: {resp.status_code}")
         else:
             errors.append(f"{node} unreachable: {err}")