diff --git a/margin-and-padding/margin-and-padding-1/README.md b/margin-and-padding/margin-and-padding-1/README.md
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--- a/margin-and-padding/margin-and-padding-1/README.md
+++ b/margin-and-padding/margin-and-padding-1/README.md
@@ -1,6 +1,6 @@
 # Margin and Padding practice
 
-For this first exercise, simply edit the `index.html` file so that the divs look like the image below. Only edit the CSS where instructed in the file.  You should only have to change the values of the margin and padding for this exercise. You should not have to add or remove properties in the CSS, or touch the HTML.
+For this first exercise, simply edit the `style.css` file so that the divs look like the image below. Only edit the CSS where instructed in the file.  You should only have to change the values of the margin and padding for this exercise. You should not have to add or remove properties in the CSS, or touch the HTML.
 
 ![outcome](./desired-outcome.png)