diff --git a/emmett/rsgi/wrappers.py b/emmett/rsgi/wrappers.py
index e6a189b6..0de63011 100644
--- a/emmett/rsgi/wrappers.py
+++ b/emmett/rsgi/wrappers.py
@@ -42,6 +42,12 @@ def __init__(
     def headers(self):
         return self._scope.headers
 
+    @cachedprop
+    def host(self) -> str:
+        if self._scope.http_version[0] == '1':
+            return self.headers.get('host')
+        return self._scope.authority
+
     @cachedprop
     def query_params(self) -> sdict[str, Union[str, List[str]]]:
         rv: sdict[str, Any] = sdict()