diff --git a/docs/cli.md b/docs/cli.md
index 9a71e0e1b92..a4c682a757d 100644
--- a/docs/cli.md
+++ b/docs/cli.md
@@ -691,7 +691,7 @@ group defined in `tool.poetry.dependencies` when used without specifying any opt
 ### Options
 
 * `--format (-f)`: The format to export to (default: `requirements.txt`).
-  Currently, only `requirements.txt` is supported.
+  Currently, only `constraints.txt` and `requirements.txt` are supported.
 * `--output (-o)`: The name of the output file.  If omitted, print to standard
   output.
 * `--dev`: Include development dependencies. (**Deprecated**, use `--with dev` instead)