diff --git a/docs/deployment.md b/docs/deployment.md
index 6826db8c5..58927d95e 100644
--- a/docs/deployment.md
+++ b/docs/deployment.md
@@ -67,8 +67,10 @@ Options:
                                   [default: 16777216]
   --ws-max-queue INTEGER          The maximum length of the WebSocket message
                                   queue.  [default: 32]
-  --ws-ping-interval FLOAT        WebSocket ping interval  [default: 20.0]
-  --ws-ping-timeout FLOAT         WebSocket ping timeout  [default: 20.0]
+  --ws-ping-interval FLOAT        WebSocket ping interval in seconds.
+                                  [default: 20.0]
+  --ws-ping-timeout FLOAT         WebSocket ping timeout in seconds.
+                                  [default: 20.0]
   --ws-per-message-deflate BOOLEAN
                                   WebSocket per-message-deflate compression
                                   [default: True]
diff --git a/docs/index.md b/docs/index.md
index 027e6cc28..a129e7a52 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -137,8 +137,10 @@ Options:
                                   [default: 16777216]
   --ws-max-queue INTEGER          The maximum length of the WebSocket message
                                   queue.  [default: 32]
-  --ws-ping-interval FLOAT        WebSocket ping interval  [default: 20.0]
-  --ws-ping-timeout FLOAT         WebSocket ping timeout  [default: 20.0]
+  --ws-ping-interval FLOAT        WebSocket ping interval in seconds.
+                                  [default: 20.0]
+  --ws-ping-timeout FLOAT         WebSocket ping timeout in seconds.
+                                  [default: 20.0]
   --ws-per-message-deflate BOOLEAN
                                   WebSocket per-message-deflate compression
                                   [default: True]
diff --git a/docs/settings.md b/docs/settings.md
index ed4bef52d..9c62460fe 100644
--- a/docs/settings.md
+++ b/docs/settings.md
@@ -70,8 +70,8 @@ Using Uvicorn with watchfiles will enable the following options (which are other
 * `--ws <str>` - Set the WebSockets protocol implementation. Either of the `websockets` and `wsproto` packages are supported. Use `'none'` to ignore all websocket requests. **Options:** *'auto', 'none', 'websockets', 'wsproto'.* **Default:** *'auto'*.
 * `--ws-max-size <int>` - Set the WebSockets max message size, in bytes. Please note that this can be used only with the default `websockets` protocol.
 * `--ws-max-queue <int>` - Set the maximum length of the WebSocket incoming message queue. Please note that this can be used only with the default `websockets` protocol.
-* `--ws-ping-interval <float>` - Set the WebSockets ping interval, in seconds. Please note that this can be used only with the default `websockets` protocol.
-* `--ws-ping-timeout <float>` - Set the WebSockets ping timeout, in seconds. Please note that this can be used only with the default `websockets` protocol.
+* `--ws-ping-interval <float>` - Set the WebSockets ping interval, in seconds. Please note that this can be used only with the default `websockets` protocol. **Default:** *20.0*
+* `--ws-ping-timeout <float>` - Set the WebSockets ping timeout, in seconds. Please note that this can be used only with the default `websockets` protocol. **Default:** *20.0*
 * `--lifespan <str>` - Set the Lifespan protocol implementation. **Options:** *'auto', 'on', 'off'.* **Default:** *'auto'*.
 * `--h11-max-incomplete-event-size <int>` - Set the maximum number of bytes to buffer of an incomplete event. Only available for `h11` HTTP protocol implementation. **Default:** *'16384'* (16 KB).
 
diff --git a/uvicorn/main.py b/uvicorn/main.py
index 4e4da6aa9..38d18207a 100644
--- a/uvicorn/main.py
+++ b/uvicorn/main.py
@@ -156,14 +156,14 @@ def print_version(ctx: click.Context, param: click.Parameter, value: bool) -> No
     "--ws-ping-interval",
     type=float,
     default=20.0,
-    help="WebSocket ping interval",
+    help="WebSocket ping interval in seconds.",
     show_default=True,
 )
 @click.option(
     "--ws-ping-timeout",
     type=float,
     default=20.0,
-    help="WebSocket ping timeout",
+    help="WebSocket ping timeout in seconds.",
     show_default=True,
 )
 @click.option(