diff --git a/.vscode/settings.json b/.vscode/settings.json
index 1a81e9a..821bf2a 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -4,5 +4,5 @@
     "editor.formatOnSave": true,
     "modulename": "${workspaceFolderBasename}",
     "distname": "${workspaceFolderBasename}",
-    "moduleversion": "1.0.20"
+    "moduleversion": "1.0.21"
 }
\ No newline at end of file
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 083d079..7eada13 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,11 @@
 # pygnssutils Release Notes
 
+### RELEASE CANDIDATE 1.0.21
+
+ENHANCEMENTS: 
+
+1. Add SSL support to gnssntripclient.
+
 ### RELEASE 1.0.20
 
 FIXES:
diff --git a/pyproject.toml b/pyproject.toml
index 35b9fc1..587e98e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "pygnssutils"
 authors = [{ name = "semuadmin", email = "semuadmin@semuconsulting.com" }]
 maintainers = [{ name = "semuadmin", email = "semuadmin@semuconsulting.com" }]
 description = "GNSS Command Line Utilities"
-version = "1.0.20"
+version = "1.0.21"
 license = { file = "LICENSE" }
 readme = "README.md"
 requires-python = ">=3.8"
@@ -34,6 +34,7 @@ classifiers = [
 ]
 
 dependencies = [
+    "certifi>=2024.0.0",
     "paho-mqtt>=1.6.0",
     "pyserial>=3.5",
     "pyspartn>=0.2.0",
diff --git a/src/pygnssutils/_version.py b/src/pygnssutils/_version.py
index 775f255..dd19086 100644
--- a/src/pygnssutils/_version.py
+++ b/src/pygnssutils/_version.py
@@ -8,4 +8,4 @@
 :license: BSD 3-Clause
 """
 
-__version__ = "1.0.20"
+__version__ = "1.0.21"
diff --git a/src/pygnssutils/gnssntripclient.py b/src/pygnssutils/gnssntripclient.py
index 1fbc38d..509957b 100644
--- a/src/pygnssutils/gnssntripclient.py
+++ b/src/pygnssutils/gnssntripclient.py
@@ -26,6 +26,7 @@
 
 import os
 import socket
+import ssl
 from argparse import ArgumentDefaultsHelpFormatter, ArgumentParser
 from base64 import b64encode
 from datetime import datetime, timedelta
@@ -34,6 +35,7 @@
 from threading import Event, Thread
 from time import sleep
 
+from certifi import where as findcacerts
 from pynmeagps import GET, NMEAMessage
 from pyrtcm import RTCMMessageError, RTCMParseError, RTCMTypeError
 from pyubx2 import ERR_IGNORE, RTCM3_PROTOCOL, UBXReader
@@ -453,8 +455,16 @@ def _read_thread(
             scopeid = int(settings["scopeid"])
             mountpoint = settings["mountpoint"]
             ggainterval = int(settings["ggainterval"])
+
             conn = format_conn(settings["ipprot"], server, port, flowinfo, scopeid)
             with socket.socket(settings["ipprot"], socket.SOCK_STREAM) as self._socket:
+                if port == 443:
+                    # context = ssl.create_default_context()
+                    context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+                    context.load_verify_locations(findcacerts())
+                    self._socket = context.wrap_socket(
+                        self._socket, server_hostname=server
+                    )
                 self._socket.settimeout(TIMEOUT)
                 self._socket.connect(conn)
                 self._socket.sendall(self._formatGET(settings))
@@ -485,6 +495,20 @@ def _read_thread(
         ):
             stopevent.set()
             self._connected = False
+        except ssl.SSLCertVerificationError as err:
+            tip = (
+                f" - try using '{server[4:]}' rather than '{server}' for the NTRIP caster URL"
+                if "certificate is not valid for 'www." in err.strerror
+                else (
+                    f" - try adding the NTRIP caster URL SSL certificate to {findcacerts()}"
+                    if "unable to get local issuer certificate" in err.strerror
+                    else ""
+                )
+            )
+            print(f"SSL Certificate Verification Error{tip}\n{err}")
+            stopevent.set()
+            self._connected = False
+            self._app_update_status(False, (f"Error!: {err.strerror[0:32]}", "red"))
 
     def _do_header(self, sock: socket, stopevent: Event, output: object) -> str:
         """