diff --git a/docs/usage.rst b/docs/usage.rst
index 0da4d18..72fe770 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -269,6 +269,12 @@ regex
 
   When multiple version strings are found, the maximum of those is chosen.
 
+post_data
+  (*Optional*) When present, a ``POST`` request (instead of a ``GET``) will be used. The value should be a string containing the full body of the request. The encoding of the string can be specified using the ``post_data_type`` option.
+
+post_data_type
+  (*Optional*) Specifies the ``Content-Type`` of the request body (``post_data``). By default, this is ``application/x-www-form-urlencoded``.
+
 This source supports :ref:`list options`.
 
 Search in an HTTP header
@@ -312,6 +318,12 @@ url
 xpath
   An xpath expression used to find the version string.
 
+post_data
+  (*Optional*) When present, a ``POST`` request (instead of a ``GET``) will be used. The value should be a string containing the full body of the request. The encoding of the string can be specified using the ``post_data_type`` option.
+
+post_data_type
+  (*Optional*) Specifies the ``Content-Type`` of the request body (``post_data``). By default, this is ``application/x-www-form-urlencoded``.
+
 .. note::
   An additional dependency "lxml" is required.
 
diff --git a/nvchecker/httpclient/aiohttp_httpclient.py b/nvchecker/httpclient/aiohttp_httpclient.py
index a122571..6af4b0f 100644
--- a/nvchecker/httpclient/aiohttp_httpclient.py
+++ b/nvchecker/httpclient/aiohttp_httpclient.py
@@ -35,6 +35,7 @@ class AiohttpSession(BaseSession):
     follow_redirects: bool = True,
     params = (),
     json = None,
+    body = None,
     verify_cert: bool = True,
   ) -> Response:
     kwargs = {
@@ -47,7 +48,13 @@ class AiohttpSession(BaseSession):
 
     if proxy is not None:
       kwargs['proxy'] = proxy
-    if json is not None:
+    if body is not None:
+      # Make sure all backends have the same default encoding for post data.
+      if 'Content-Type' not in headers:
+        headers = {**headers, 'Content-Type': 'application/x-www-form-urlencoded'}
+        kwargs['headers'] = headers
+      kwargs['data'] = body.encode()
+    elif json is not None:
       kwargs['json'] = json
 
     try:
diff --git a/nvchecker/httpclient/base.py b/nvchecker/httpclient/base.py
index b9e2101..ae861f9 100644
--- a/nvchecker/httpclient/base.py
+++ b/nvchecker/httpclient/base.py
@@ -61,6 +61,7 @@ class BaseSession:
     follow_redirects: bool = True,
     params = (),
     json = None,
+    body = None,
   ) -> Response:
     t = tries.get()
     p = proxy.get()
@@ -82,6 +83,7 @@ class BaseSession:
           params = params,
           follow_redirects = follow_redirects,
           json = json,
+          body = body,
           proxy = p or None,
           verify_cert = verify,
         )
@@ -103,6 +105,7 @@ class BaseSession:
     follow_redirects: bool = True,
     params = (),
     json = None,
+    body = None,
     verify_cert: bool = True,
   ) -> Response:
     ''':meta private:'''
diff --git a/nvchecker/httpclient/httpx_httpclient.py b/nvchecker/httpclient/httpx_httpclient.py
index 7cf2345..3a17fb3 100644
--- a/nvchecker/httpclient/httpx_httpclient.py
+++ b/nvchecker/httpclient/httpx_httpclient.py
@@ -27,6 +27,7 @@ class HttpxSession(BaseSession):
     follow_redirects: bool = True,
     params = (),
     json = None,
+    body = None,
     verify_cert: bool = True,
   ) -> Response:
     client = self.clients.get((proxy, verify_cert))
@@ -40,8 +41,13 @@ class HttpxSession(BaseSession):
       self.clients[(proxy, verify_cert)] = client
 
     try:
+      if body is not None:
+        # Make sure all backends have the same default encoding for post data.
+        if 'Content-Type' not in headers:
+          headers = {**headers, 'Content-Type': 'application/x-www-form-urlencoded'}
+        body = body.encode()
       r = await client.request(
-        method, url, json = json,
+        method, url, json = json, content = body,
         headers = headers,
         allow_redirects = follow_redirects,
         params = params,
diff --git a/nvchecker/httpclient/tornado_httpclient.py b/nvchecker/httpclient/tornado_httpclient.py
index 6d5240c..ce813ff 100644
--- a/nvchecker/httpclient/tornado_httpclient.py
+++ b/nvchecker/httpclient/tornado_httpclient.py
@@ -52,6 +52,7 @@ class TornadoSession(BaseSession):
     follow_redirects: bool = True,
     params = (),
     json = None,
+    body = None,
     verify_cert: bool = True,
   ) -> Response:
     kwargs: Dict[str, Any] = {
@@ -62,7 +63,10 @@ class TornadoSession(BaseSession):
       'validate_cert': verify_cert,
     }
 
-    if json:
+    if body:
+      # By default the content type is already 'application/x-www-form-urlencoded'
+      kwargs['body'] = body
+    elif json:
       kwargs['body'] = _json.dumps(json)
     kwargs['prepare_curl_callback'] = try_use_http2
 
diff --git a/nvchecker_source/htmlparser.py b/nvchecker_source/htmlparser.py
index a64f213..077f1e0 100644
--- a/nvchecker_source/htmlparser.py
+++ b/nvchecker_source/htmlparser.py
@@ -15,7 +15,13 @@ async def get_version_impl(info):
 
   encoding = conf.get('encoding')
   parser = html.HTMLParser(encoding=encoding)
-  res = await session.get(conf['url'])
+  data = conf.get('post_data')
+  if data is None:
+    res = await session.get(conf['url'])
+  else:
+    res = await session.post(conf['url'], body = data, headers = {
+        'Content-Type': conf.get('post_data_type', 'application/x-www-form-urlencoded')
+      })
   doc = html.fromstring(res.body, base_url=conf['url'], parser=parser)
 
   try:
diff --git a/nvchecker_source/regex.py b/nvchecker_source/regex.py
index 1660b4f..48406e1 100644
--- a/nvchecker_source/regex.py
+++ b/nvchecker_source/regex.py
@@ -20,7 +20,13 @@ async def get_version_impl(info):
 
   encoding = conf.get('encoding', 'latin1')
 
-  res = await session.get(conf['url'])
+  data = conf.get('post_data')
+  if data is None:
+    res = await session.get(conf['url'])
+  else:
+    res = await session.post(conf['url'], body = data, headers = {
+        'Content-Type': conf.get('post_data_type', 'application/x-www-form-urlencoded')
+      })
   body = res.body.decode(encoding)
   versions = regex.findall(body)
   if not versions and not conf.get('missing_ok', False):
diff --git a/tests/test_regex.py b/tests/test_regex.py
index e54bca1..1b4c255 100644
--- a/tests/test_regex.py
+++ b/tests/test_regex.py
@@ -87,3 +87,36 @@ async def test_regex_bad_ssl(get_version, httpbin_secure):
     else:
         assert False, 'certificate should not be trusted'
 
+async def test_regex_post(get_version, httpbin):
+    assert await get_version("example", {
+        "source": "regex",
+        "url": httpbin.url + "/post",
+        "regex": r'"ABCDEF":\s*"(\w+)"',
+        "post_data": "ABCDEF=234&CDEFG=xyz"
+    }) == "234"
+
+async def test_regex_post2(get_version, httpbin):
+    assert await get_version("example", {
+        "source": "regex",
+        "url": httpbin.url + "/post",
+        "regex": r'"CDEFG":\s*"(\w+)"',
+        "post_data": "ABCDEF=234&CDEFG=xyz"
+    }) == "xyz"
+
+async def test_regex_post_json(get_version, httpbin):
+    assert await get_version("example", {
+        "source": "regex",
+        "url": httpbin.url + "/post",
+        "regex": r'"ABCDEF":\s*(\w+)',
+        "post_data": '{"ABCDEF":234,"CDEFG":"xyz"}',
+        "post_data_type": "application/json"
+    }) == "234"
+
+async def test_regex_post_json2(get_version, httpbin):
+    assert await get_version("example", {
+        "source": "regex",
+        "url": httpbin.url + "/post",
+        "regex": r'"CDEFG":\s*"(\w+)"',
+        "post_data": '{"ABCDEF":234,"CDEFG":"xyz"}',
+        "post_data_type": "application/json"
+    }) == "xyz"