diff --git a/.gitignore b/.gitignore
index d2a395a..f2a1287 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,8 +19,6 @@ __pycache__
 *.iml
 .idea
 
-imalive.yml
-
 # Eclipse Core
 .project
 
diff --git a/README.md b/README.md
index 39925e7..b49a709 100644
--- a/README.md
+++ b/README.md
@@ -250,7 +250,7 @@ monitors:
     method: POST # optional (GET by default, only POST, PUT and GET are supported)
     body: '{"foo": "bar"}' # optional (body is ignored if method is GET)
     check_tls: false # optional (true by default)
-    expected_http_code: 200 # optional (200 by default)
+    expected_http_code: "20*" # optional (20* by default), wildcard means "begin with"
     expected_contain: "\"status\":\"ok\"" # optional (no check on the body response if not present)
     timeout: 30 # optional (30 seconds if not present)
     username: changeit # optional (no basic auth if not present)
diff --git a/VERSION b/VERSION
index 805226c..86edc68 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.0.19
+4.0.20
diff --git a/src/utils/monitor.py b/src/utils/monitor.py
index f3ca23d..a7216aa 100644
--- a/src/utils/monitor.py
+++ b/src/utils/monitor.py
@@ -1,4 +1,5 @@
 import os
+import re
 import yaml
 import requests
 import asyncio
@@ -17,6 +18,10 @@
 from utils.logger import log_msg
 from utils.otel import get_otel_tracer
 
+def check_status_code_pattern(actual_code, pattern):
+    regexp = "^{}$".format(pattern.replace('*', '[0-9]+'))
+    return bool(re.match(regexp, str(actual_code)))
+
 def check_http_monitor(monitor, gauges):
     vdate = datetime.now()
 
@@ -49,7 +54,7 @@ def check_http_monitor(monitor, gauges):
 
     method = get_or_else(monitor, 'method', 'GET')
     timeout = get_or_else(monitor, 'timeout', 30)
-    expected_http_code = get_or_else(monitor, 'expected_http_code', 200)
+    expected_http_code = get_or_else(monitor, 'expected_http_code', '20*')
     expected_contain = get_or_else(monitor, 'expected_contain', None)
     body = get_or_else(monitor, 'body', None)
     check_tls = is_true(get_or_else(monitor, 'check_tls', True))
@@ -94,7 +99,7 @@ def check_http_monitor(monitor, gauges):
             set_gauge(gauges['result'], 0, {**labels, 'kind': 'result'})
             return
 
-        if response.status_code != expected_http_code:
+        if not check_status_code_pattern(response.status_code, expected_http_code):
             log_msg("ERROR", {
                 "status": "ko",
                 "type": "monitor",