diff --git a/src/handlers.py b/src/handlers.py
index 2d082b3..3887a78 100644
--- a/src/handlers.py
+++ b/src/handlers.py
@@ -136,6 +136,7 @@ class BaseHandler(abc.ABC, http.server.BaseHTTPRequestHandler):
     def send_proxy(self, url: str) -> None:
         headers = dict(self.headers)
         headers["Host"] = urllib.parse.urlparse(url).netloc
+        headers["X-Forwarded-Host"] = self.host
         headers["X-Forwarded-For"] = self.client_address[0]
         headers["X-Real-IP"] = self.client_address[0]
         try:
diff --git a/tests/test_handlers.py b/tests/test_handlers.py
index c91be42..0d79e36 100644
--- a/tests/test_handlers.py
+++ b/tests/test_handlers.py
@@ -756,6 +756,7 @@ class TestRequestHandler(BaseHandlerTestCase):
                     "data": None,
                     "headers": {
                         "Host": "example.com",
+                        "X-Forwarded-Host": "localhost",
                         "X-Forwarded-For": "127.0.0.1",
                         "X-Real-IP": "127.0.0.1",
                     },
@@ -795,6 +796,7 @@ class TestRequestHandler(BaseHandlerTestCase):
                     "data": b"hello",
                     "headers": {
                         "Host": "example.com",
+                        "X-Forwarded-Host": "localhost",
                         "X-Forwarded-For": "127.0.0.1",
                         "X-Real-IP": "127.0.0.1",
                         "Content-Length": "5",
@@ -834,6 +836,7 @@ class TestRequestHandler(BaseHandlerTestCase):
                     "data": None,
                     "headers": {
                         "Host": "example.com",
+                        "X-Forwarded-Host": "localhost",
                         "X-Forwarded-For": "127.0.0.1",
                         "X-Real-IP": "127.0.0.1",
                     },
@@ -864,6 +867,7 @@ class TestRequestHandler(BaseHandlerTestCase):
                     "data": None,
                     "headers": {
                         "Host": "example.com",
+                        "X-Forwarded-Host": "localhost",
                         "X-Forwarded-For": "127.0.0.1",
                         "X-Real-IP": "127.0.0.1",
                     },
@@ -903,6 +907,7 @@ class TestRequestHandler(BaseHandlerTestCase):
                     "data": None,
                     "headers": {
                         "Host": "example.com",
+                        "X-Forwarded-Host": "localhost",
                         "X-Forwarded-For": "127.0.0.1",
                         "X-Real-IP": "127.0.0.1",
                     },
@@ -939,6 +944,7 @@ class TestRequestHandler(BaseHandlerTestCase):
                     "data": None,
                     "headers": {
                         "Host": "example.com",
+                        "X-Forwarded-Host": "host",
                         "X-Forwarded-For": "127.0.0.1",
                         "X-Real-IP": "127.0.0.1",
                     },