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diff --git a/README.md b/README.md
index 935a523..692e05c 100644
--- a/README.md
+++ b/README.md
@@ -88,7 +88,7 @@ Install through
 
 ## Quick Guide
 
-1. **String-literal mode**. By default, expressions are treated as regex. Use `-s` or `--string-mode` to disable regex.
+1. **String-literal mode**. By default, expressions are treated as regex. Use `-F` or `--fixed-strings` to disable regex.
 
    ```sh
    > echo 'lots((([]))) of special chars' | sd -s '((([])))' ''