diff --git a/packages/webpack-cli/README.md b/packages/webpack-cli/README.md
index 53fa3fab654..b61c56274f4 100644
--- a/packages/webpack-cli/README.md
+++ b/packages/webpack-cli/README.md
@@ -53,7 +53,7 @@ yarn add webpack-cli --dev
   --no-hot                 Disables Hot Module Replacement
   -d, --devtool string     Controls if and how source maps are generated.
   --prefetch string        Prefetch this request
-  -j, --json               Prints result as JSON
+  -j, --json string        Prints result as JSON or store it in a file
   --mode string            Defines the mode to pass to webpack
   -v, --version            Get current version
   --stats string           It instructs webpack on how to treat the stats