diff --git a/README.md b/README.md
index 3aee993..a01deb4 100644
--- a/README.md
+++ b/README.md
@@ -62,3 +62,13 @@ Jekyll uses the [Liquid template language](https://shopify.github.io/liquid/) to
 ### Why are all the pages stored as `{{actual-page-name}}/index.html` instead of `{{actual-page-name}}.html`?
 
 It's a matter of personal preference! I think URLs look cleaner without unnecessary filetype suffixes, and this is a way to achieve the cleaner URLs I crave.
+
+### I'm getting an error when running `jekyll serve` locally
+
+If your error includes this message:
+
+    cannot load such file -- webrick (LoadError)
+   
+You may need to install webrick manually with gem
+
+    gem install webrick