diff --git a/.gitignore b/.gitignore
index eeb1f9d..fe1c1e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -73,6 +73,7 @@ Pipfile.lock
 
 .pytest_cache
 .python-version
+.*rc
 
 .DS_Store
 ._.DS_Store
diff --git a/README.rst b/README.rst
index d2f67d4..3930259 100644
--- a/README.rst
+++ b/README.rst
@@ -62,7 +62,7 @@ Monitor has context manager interface:
 
 Now from separate terminal it is possible to connect to the application::
 
-    $ telnet localhost 50101
+    $ telnet localhost 20101
 
 or the included python client::
 
@@ -113,7 +113,7 @@ Let's save this code in file ``simple_srv.py``, so we can run it with the follow
 And now one can connect to a running application from a separate terminal, with
 the ``telnet`` command, and ``aiomonitor`` will immediately respond with prompt::
 
-    $ telnet localhost 50101
+    $ telnet localhost 20101
     Asyncio Monitor: 1 tasks running
     Type help for commands
     monitor >>>
diff --git a/aiomonitor/__init__.py b/aiomonitor/__init__.py
index 60f40b3..4bcec02 100644
--- a/aiomonitor/__init__.py
+++ b/aiomonitor/__init__.py
@@ -7,7 +7,7 @@
 
     loop = asyncio.get_event_loop()
     with aiomonitor.start_monitor():
-        print("Now you can connect with: nc localhost 50101")
+        print("Now you can connect with: nc localhost 20101")
         loop.run_forever()
 
 Alternatively you can use more verbose try/finally approach::
@@ -22,16 +22,18 @@
 
 from importlib.metadata import version
 
-from .monitor import MONITOR_TERMUI_PORT  # for backward compatibility
 from .monitor import (
     CONSOLE_PORT,
     MONITOR_HOST,
+    MONITOR_TERMUI_PORT,
     MONITOR_WEBUI_PORT,
     Monitor,
     start_monitor,
 )
 from .termui.commands import monitor_cli
 
+MONITOR_PORT = MONITOR_TERMUI_PORT  # for backward compatibility
+
 __all__ = (
     "Monitor",
     "start_monitor",
diff --git a/aiomonitor/monitor.py b/aiomonitor/monitor.py
index 8166659..5aca27d 100644
--- a/aiomonitor/monitor.py
+++ b/aiomonitor/monitor.py
@@ -65,9 +65,9 @@
 log = logging.getLogger(__name__)
 
 MONITOR_HOST: Final = "127.0.0.1"
-MONITOR_TERMUI_PORT: Final = 50101
-CONSOLE_PORT: Final = 50102
-MONITOR_WEBUI_PORT: Final = 50201
+MONITOR_TERMUI_PORT: Final = 20101
+MONITOR_WEBUI_PORT: Final = 20102
+CONSOLE_PORT: Final = 20103
 
 T = TypeVar("T")
 T_co = TypeVar("T_co", covariant=True)
diff --git a/changes/374.feature.md b/changes/374.feature.md
new file mode 100644
index 0000000..2178d4f
--- /dev/null
+++ b/changes/374.feature.md
@@ -0,0 +1 @@
+Replace the default port numbers for the terminal UI, the web UI, and the console access (50101, 50201, 50102 -> 20101, 20102, 20103 respectively)
diff --git a/docs/api.rst b/docs/api.rst
index a814242..cbc4032 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -12,7 +12,7 @@ simple as opening a file.
 
     loop = asyncio.get_event_loop()
     with aiomonitor.start_monitor(loop):
-        print("Now you can connect with: nc localhost 50101")
+        print("Now you can connect with: nc localhost 20101")
         loop.run_forever()
 
 Alternatively you can use more verbose try/finally approach but do not forget
@@ -40,14 +40,22 @@ Reference
 
 .. data:: MONITOR_HOST = '127.0.0.1'
 
-    Specifies the default host for monitor, by default monitor binded to
-    ``localhost``.
+    Specifies the default host to bind the services for the monitor
 
-.. data:: MONITOR_PORT = 50101
+    .. warning::
 
-    Specifies the default port for monitor, you can connect using telnet client
+       Since aiomonitor exposes the internal states of the traced process, never bind it to
+       publicly accessible address to prevent potential security breaches and denial of services!
 
-.. data:: CONSOLE_PORT = 50102
+.. data:: MONITOR_TERMUI_PORT = 20101
+
+    Specifies the default telnet port for teh monitor where you can connect using a telnet client
+
+.. data:: MONITOR_WEBUI_PORT = 20102
+
+    Specifies the default HTTP port for the monitor where you can connect using a web browser
+
+.. data:: CONSOLE_PORT = 20103
 
     Specifies the default port for asynchronous python REPL
 
@@ -59,9 +67,9 @@ Reference
 
     :param Type[Monitor] monitor: Monitor class to use
     :param str host: hostname to serve monitor telnet server
-    :param int port: monitor port (terminal UI), by default 50101
-    :param int webui_port: monitor port (web UI), by default 50201
-    :param int console_port: python REPL port, by default 50102
+    :param int port: monitor port (terminal UI), by default 20101
+    :param int webui_port: monitor port (web UI), by default 20102
+    :param int console_port: python REPL port, by default 20103
     :param bool console_enabled: flag indicates if python REPL is requred
         to start with instance of monitor.
     :param dict locals: dictionary with variables exposed in python console
diff --git a/docs/tutorial.rst b/docs/tutorial.rst
index 23bc508..27710da 100644
--- a/docs/tutorial.rst
+++ b/docs/tutorial.rst
@@ -45,7 +45,7 @@ And now it is possible to connect to the running application from separate
 terminal, by execution ``nc`` command, immediately ``aiomonitor`` will
 respond with prompt::
 
-    $ nc localhost 50101
+    $ telnet localhost 20101
     Asyncio Monitor: 1 tasks running
     Type help for commands
     monitor >>>