diff --git a/emmett/__version__.py b/emmett/__version__.py
index 7a2056f5..667b52f9 100644
--- a/emmett/__version__.py
+++ b/emmett/__version__.py
@@ -1 +1 @@
-__version__ = "2.5.1"
+__version__ = "2.5.2"
diff --git a/emmett/asgi/handlers.py b/emmett/asgi/handlers.py
index 0a9a9425..2c93455a 100644
--- a/emmett/asgi/handlers.py
+++ b/emmett/asgi/handlers.py
@@ -250,13 +250,15 @@ def _static_lang_matcher(
     def _static_nolang_matcher(
         self, path: str
     ) -> Tuple[Optional[str], Optional[str]]:
-        if path.startswith('/static'):
+        if path.startswith('/static/'):
             mname, version, file_name = REGEX_STATIC.match(path).group('m', 'v', 'f')
             if mname:
                 mod = self.app._modules.get(mname[2:-3])
                 static_file = os.path.join(mod._static_path, file_name) if mod else None
-            else:
+            elif file_name:
                 static_file = os.path.join(self.app.static_path, file_name)
+            else:
+                static_file = None
             return static_file, version
         return None, None
 
@@ -288,7 +290,7 @@ def _static_handler(
         #: handle internal assets
         if path.startswith('/__emmett__'):
             file_name = path[12:]
-            if file_name.endswith(".html"):
+            if not file_name or file_name.endswith(".html"):
                 return self._http_response(404)
             pkg = None
             if '/' in file_name:
diff --git a/emmett/http.py b/emmett/http.py
index bdc4b5e7..ee21ab3a 100644
--- a/emmett/http.py
+++ b/emmett/http.py
@@ -244,12 +244,12 @@ def rsgi(self, protocol: HTTPProtocol):
         try:
             stat_data = os.stat(self.file_path)
             if not stat.S_ISREG(stat_data.st_mode):
-                return HTTP(403).rsgi()
+                return HTTP(403).rsgi(protocol)
             self._headers.update(self._get_stat_headers(stat_data))
         except IOError as e:
             if e.errno == errno.EACCES:
-                return HTTP(403).rsgi()
-            return HTTP(404).rsgi()
+                return HTTP(403).rsgi(protocol)
+            return HTTP(404).rsgi(protocol)
 
         protocol.response_file(
             self.status_code,
diff --git a/emmett/rsgi/handlers.py b/emmett/rsgi/handlers.py
index 80966067..433b0d8c 100644
--- a/emmett/rsgi/handlers.py
+++ b/emmett/rsgi/handlers.py
@@ -144,13 +144,15 @@ def _static_lang_matcher(
     def _static_nolang_matcher(
         self, path: str
     ) -> Tuple[Optional[str], Optional[str]]:
-        if path.startswith('/static'):
+        if path.startswith('/static/'):
             mname, version, file_name = REGEX_STATIC.match(path).group('m', 'v', 'f')
             if mname:
                 mod = self.app._modules.get(mname[2:-3])
                 static_file = os.path.join(mod._static_path, file_name) if mod else None
-            else:
+            elif file_name:
                 static_file = os.path.join(self.app.static_path, file_name)
+            else:
+                static_file = None
             return static_file, version
         return None, None
 
@@ -166,8 +168,11 @@ def _static_handler(
         #: handle internal assets
         if path.startswith('/__emmett__'):
             file_name = path[12:]
+            if not file_name:
+                return self._http_response(404)
             static_file = os.path.join(
-                os.path.dirname(__file__), '..', 'assets', file_name)
+                os.path.dirname(__file__), '..', 'assets', file_name
+            )
             if os.path.splitext(static_file)[1] == 'html':
                 return self._http_response(404)
             return self._static_response(static_file)
diff --git a/pyproject.toml b/pyproject.toml
index b536da3d..4ba696bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "emmett"
-version = "2.5.1"
+version = "2.5.2"
 description = "The web framework for inventors"
 authors = ["Giovanni Barillari <gi0baro@d4net.org>"]
 license = "BSD-3-Clause"
@@ -43,7 +43,7 @@ emmett = "emmett.cli:main"
 [tool.poetry.dependencies]
 python = "^3.8"
 click = ">=6.0"
-granian = "~0.4.0"
+granian = "~0.4.2"
 emmett-crypto = "~0.3"
 pendulum = "~2.1.2"
 pyDAL = "17.3"