diff --git a/README.md b/README.md
index 99b44af50200..47ee70bcb073 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,7 @@ To install:
    source "https://rubygems.org"
 
    gem "github-pages", group: :jekyll_plugins
+   gem "jekyll-include-cache", group: :jekyll_plugins
    ```
 
 2. Add `jekyll-include-cache` to the `plugins` array of your `_config.yml`.
diff --git a/docs/_docs/01-quick-start-guide.md b/docs/_docs/01-quick-start-guide.md
index 0573504ac6e3..c9d46bd1b420 100644
--- a/docs/_docs/01-quick-start-guide.md
+++ b/docs/_docs/01-quick-start-guide.md
@@ -64,6 +64,7 @@ To install as a remote theme:
    source "https://rubygems.org"
 
    gem "github-pages", group: :jekyll_plugins
+   gem "jekyll-include-cache", group: :jekyll_plugins
    ```
 
 2. Add `jekyll-include-cache` to the `plugins` array of your `_config.yml`.