diff --git a/renumics/spotlight/cli.py b/renumics/spotlight/cli.py
index ec117e9f..79632299 100644
--- a/renumics/spotlight/cli.py
+++ b/renumics/spotlight/cli.py
@@ -124,6 +124,12 @@ def cli_dtype_callback(
 @click.option(
     "--ssl-keyfile-password", type=str, default=None, help="SSL keyfile password"
 )
+@click.option(
+    "--no-ssl",
+    is_flag=True,
+    default=False,
+    help="Do not require SSL sertificate and keyfile when starting on non-localhost.",
+)
 @click.option("-v", "--verbose", is_flag=True)
 @click.version_option(spotlight.__version__)
 def main(
@@ -142,6 +148,7 @@ def main(
     ssl_keyfile: Optional[str],
     ssl_certfile: Optional[str],
     ssl_keyfile_password: Optional[str],
+    no_ssl: bool,
     verbose: bool,
 ) -> None:
     """
@@ -171,4 +178,5 @@ def main(
         ssl_keyfile=ssl_keyfile,
         ssl_certfile=ssl_certfile,
         ssl_keyfile_password=ssl_keyfile_password,
+        no_ssl=no_ssl,
     )
diff --git a/renumics/spotlight/server.py b/renumics/spotlight/server.py
index dd7f9e95..7dd8801a 100644
--- a/renumics/spotlight/server.py
+++ b/renumics/spotlight/server.py
@@ -72,6 +72,7 @@ def __init__(
         ssl_keyfile: Optional[str] = None,
         ssl_certfile: Optional[str] = None,
         ssl_keyfile_password: Optional[str] = None,
+        no_ssl: bool = False,
     ) -> None:
         self.process = None
 
@@ -80,7 +81,7 @@ def __init__(
         self._app_config = AppConfig()
 
         self._host = host
-        if self._host not in ("127.0.0.1", "localhost"):
+        if self._host not in ("127.0.0.1", "localhost") and not no_ssl:
             if ssl_certfile is None:
                 raise MissingTLSCertificate(
                     "Starting Spotlight on non-localhost without TLS certificate is insecure. Please provide TLS certificate and key."
diff --git a/renumics/spotlight/viewer.py b/renumics/spotlight/viewer.py
index 49d894ae..ea87110f 100644
--- a/renumics/spotlight/viewer.py
+++ b/renumics/spotlight/viewer.py
@@ -132,6 +132,7 @@ class Viewer:
     _ssl_keyfile: Optional[str]
     _ssl_certfile: Optional[str]
     _ssl_keyfile_password: Optional[str]
+    _no_ssl: bool
     _server: Optional[Server]
     _df: Optional[pd.DataFrame]
 
@@ -142,12 +143,14 @@ def __init__(
         ssl_keyfile: Optional[str] = None,
         ssl_certfile: Optional[str] = None,
         ssl_keyfile_password: Optional[str] = None,
+        no_ssl: bool = False,
     ) -> None:
         self._host = host
         self._requested_port = port
         self._ssl_keyfile = ssl_keyfile
         self._ssl_certfile = ssl_certfile
         self._ssl_keyfile_password = ssl_keyfile_password
+        self._no_ssl = no_ssl
         self._server = None
         self._df = None
 
@@ -233,6 +236,7 @@ def show(
                 self._ssl_keyfile,
                 self._ssl_certfile,
                 self._ssl_keyfile_password,
+                self._no_ssl,
             )
             self._server.start(config)
 
@@ -406,6 +410,7 @@ def show(
     ssl_keyfile: Optional[str] = None,
     ssl_certfile: Optional[str] = None,
     ssl_keyfile_password: Optional[str] = None,
+    no_ssl: bool = False,
 ) -> Viewer:
     """
     Start a new Spotlight viewer.
@@ -435,6 +440,7 @@ def show(
         ssl_keyfile: Optional SSL key file.
         ssl_certfile: Optional SSL certificate file.
         ssl_certfile: Optional SSL keyfile password.
+        no_ssl: Do not require SSL sertificate and keyfile when starting on non-localhost.
     """
 
     viewer = None
@@ -445,7 +451,9 @@ def show(
                 viewer = _VIEWERS[index]
                 break
     if not viewer:
-        viewer = Viewer(host, port, ssl_keyfile, ssl_certfile, ssl_keyfile_password)
+        viewer = Viewer(
+            host, port, ssl_keyfile, ssl_certfile, ssl_keyfile_password, no_ssl
+        )
 
     viewer.show(
         dataset,