diff --git a/README.md b/README.md
index aef356e..0021cb3 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,7 @@ httpserve [port_number]
 ```
 
 The default port number is `8080`.
+
+## Warning: Unencrypted
+
+**Do not share sensitive content over untrusted networks.**