diff --git a/doc/client-proxy.md b/doc/client-proxy.md
index cb968c743..17584fbff 100644
--- a/doc/client-proxy.md
+++ b/doc/client-proxy.md
@@ -25,7 +25,7 @@ By default, Layman will not adjust URLs in its response to contain also URL path
 
 Layman supports three optional X-Forwarded HTTP headers, whose values will be used in some URLs in Layman responses:
 - `X-Forwarded-Proto`: The value will be used as protocol in some URLs, and it is required to be `http` or `https`.
-- `X-Forwarded-Host`: The value will be used as host in some URLs, and it is required to match regular expression `^(?=.{1,253}\.?(?:\:[0-9]{1,5})?$)(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$`.
+- `X-Forwarded-Host`: The value will be used as host in some URLs, and it is required to match regular expression `^(?=.{1,253}(?:\:|$))(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$`.
 - `X-Forwarded-Prefix`: The value will be used as prefix in some URL paths, and it is required to match regular expression `^(?:/[a-z0-9_-]+)*$`.
 
 For example, consider there is layman running at `https://enjoychallenge.tech/rest` and client proxy running at `https://laymanproxy.com/layman-client-proxy`. If you send request to your Layman proxy `https://laymanproxy.com/layman-client-proxy/rest/publications` with HTTP headers
diff --git a/src/layman/util.py b/src/layman/util.py
index 0eebd57fc..e1e9d545d 100644
--- a/src/layman/util.py
+++ b/src/layman/util.py
@@ -34,7 +34,7 @@
 HEADER_X_FORWARDED_PROTO_KEY = 'X-Forwarded-Proto'
 HEADER_X_FORWARDED_HOST_KEY = 'X-Forwarded-Host'
 HEADER_X_FORWARDED_PREFIX_KEY = 'X-Forwarded-Prefix'
-HOST_NAME_PATTERN = r'^(?=.{1,253}\.?(?:\:[0-9]{1,5})?$)(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$'
+HOST_NAME_PATTERN = r'^(?=.{1,253}(?:\:|$))(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$'
 
 
 class SimpleStorage:
diff --git a/src/layman/util_test.py b/src/layman/util_test.py
index 4c301d629..cc26f8857 100644
--- a/src/layman/util_test.py
+++ b/src/layman/util_test.py
@@ -227,7 +227,7 @@ def test_get_x_forwarded_items(headers, exp_result):
             'data': {
                 'header': 'X-Forwarded-Host',
                 'message': 'Optional header X-Forwarded-Host contains unsupported value.',
-                'expected': r'Expected header matching regular expression ^(?=.{1,253}\.?(?:\:[0-9]{1,5})?$)(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$',
+                'expected': r'Expected header matching regular expression ^(?=.{1,253}(?:\:|$))(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$',
                 'found': 'ABZ.COM',
             },
         }, id='uppercase-host'),
@@ -239,7 +239,7 @@ def test_get_x_forwarded_items(headers, exp_result):
             'data': {
                 'header': 'X-Forwarded-Host',
                 'message': 'Optional header X-Forwarded-Host contains unsupported value.',
-                'expected': r'Expected header matching regular expression ^(?=.{1,253}\.?(?:\:[0-9]{1,5})?$)(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$',
+                'expected': r'Expected header matching regular expression ^(?=.{1,253}(?:\:|$))(?:(?!-)[a-z0-9-_]{1,63}(?<!-)(?:\.|(?:\:[0-9]{1,5})?$))+$',
                 'found': '',
             },
         }, id='empty-host'),