diff --git a/README.md b/README.md
index 1d84e611..8ace165b 100644
--- a/README.md
+++ b/README.md
@@ -129,14 +129,16 @@ The HTTPX project relies on these excellent libraries:
 
 * `httpcore` - The underlying transport implementation for `httpx`.
   * `h11` - HTTP/1.1 support.
-  * `h2` - HTTP/2 support. *(Optional)*
+  * `h2` - HTTP/2 support. *(Optional, with `httpx[http2]`)*
 * `certifi` - SSL certificates.
 * `charset_normalizer` - Charset auto-detection.
 * `rfc3986` - URL parsing & normalization.
   * `idna` - Internationalized domain name support.
 * `sniffio` - Async library autodetection.
+* `rich` - Rich terminal support. *(Optional, with `httpx[cli]`)*
+* `click` - Command line client support. *(Optional, with `httpx[cli]`)*
 * `async_generator` - Backport support for `contextlib.asynccontextmanager`. *(Only required for Python 3.6)*
-* `brotli` or `brotlicffi` - Decoding for "brotli" compressed responses. *(Optional)*
+* `brotli` or `brotlicffi` - Decoding for "brotli" compressed responses. *(Optional, with `httpx[brotli]`)*
 
 A huge amount of credit is due to `requests` for the API layout that
 much of this work follows, as well as to `urllib3` for plenty of design
diff --git a/docs/index.md b/docs/index.md
index b302379a..4445c016 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -114,14 +114,16 @@ The HTTPX project relies on these excellent libraries:
 
 * `httpcore` - The underlying transport implementation for `httpx`.
   * `h11` - HTTP/1.1 support.
-  * `h2` - HTTP/2 support. *(Optional)*
+  * `h2` - HTTP/2 support. *(Optional, with `httpx[http2]`)*
 * `certifi` - SSL certificates.
 * `charset_normalizer` - Charset auto-detection.
 * `rfc3986` - URL parsing & normalization.
   * `idna` - Internationalized domain name support.
 * `sniffio` - Async library autodetection.
+* `rich` - Rich terminal support. *(Optional, with `httpx[cli]`)*
+* `click` - Command line client support. *(Optional, with `httpx[cli]`)*
 * `async_generator` - Backport support for `contextlib.asynccontextmanager`. *(Only required for Python 3.6)*
-* `brotli` or `brotlicffi` - Decoding for "brotli" compressed responses. *(Optional)*
+* `brotli` or `brotlicffi` - Decoding for "brotli" compressed responses. *(Optional, with `httpx[brotli]`)*
 
 A huge amount of credit is due to `requests` for the API layout that
 much of this work follows, as well as to `urllib3` for plenty of design