diff --git a/README.md b/README.md
index 7f41e7bd..177fa068 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,8 @@ Review the [Contributing Guidelines](CONTRIBUTING.md).
   <br/>
 </p>
 
+## Table of Contents
+
 * [System design topics: start here](#system-design-topics-start-here)
     * [Step 1: Review the scalability video lecture](#step-1-review-the-scalability-video-lecture)
     * [Step 2: Review the scalability article](#step-2-review-the-scalability-article)
@@ -179,6 +181,8 @@ Review the [Contributing Guidelines](CONTRIBUTING.md).
 * [Contact info](#contact-info)
 * [License](#license)
 
+<br>
+
 ## Study guide
 
 > Suggested topics to review based on your interview timeline (short, medium, long).
diff --git a/_config.yaml b/_config.yaml
new file mode 100644
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+theme: jekyll-theme-cayman
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