diff --git a/monitoring/blackbox/blackbox.yml b/monitoring/blackbox/blackbox.yml
index ac561ac..ad34c31 100644
--- a/monitoring/blackbox/blackbox.yml
+++ b/monitoring/blackbox/blackbox.yml
@@ -1,8 +1,18 @@
 modules:
-  http_2xx:
+  http_reachable:
     prober: http
     timeout: 10s
     http:
+      valid_status_codes:
+        - 200
+        - 204
+        - 301
+        - 302
+        - 303
+        - 307
+        - 308
+        - 401
+        - 403
       valid_http_versions:
         - HTTP/1.1
         - HTTP/2.0
diff --git a/monitoring/prometheus/prometheus.yml b/monitoring/prometheus/prometheus.yml
index 7249485..29151c5 100644
--- a/monitoring/prometheus/prometheus.yml
+++ b/monitoring/prometheus/prometheus.yml
@@ -34,7 +34,7 @@ scrape_configs:
     metrics_path: /probe
     params:
       module:
-        - http_2xx
+        - http_reachable
     static_configs:
       - targets:
           - https://monitoring.kaleschke.info