diff --git a/docs/Supplementary/1-supplementary.md b/docs/Supplementary/1-supplementary.md
index 2b739e1..05dc573 100644
--- a/docs/Supplementary/1-supplementary.md
+++ b/docs/Supplementary/1-supplementary.md
@@ -1,3 +1,7 @@
+---
+comments: true
+---
+
 # 1. Supplementary - File manipulation
 
 ## File manipulation and more practice with pipes
diff --git a/mkdocs.yml b/mkdocs.yml
index 312654a..1e00ccb 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -11,6 +11,7 @@ repo_url: https://github.com/GenomicsAotearoa/introduction-to-shell
 
 theme:
   name: material
+  custom_dir: overrides
   logo: fig/nesi_ga.png
   favicon: fig/nesi_ga.png
    # 404 page
diff --git a/overrides/partials/comments.html b/overrides/partials/comments.html
new file mode 100644
index 0000000..ff3eb4d
--- /dev/null
+++ b/overrides/partials/comments.html
@@ -0,0 +1,54 @@
+{% if page.meta.comments %}
+  <h2 id="__comments">{{ lang.t("meta.comments") }}</h2>
+  <script src="https://giscus.app/client.js"
+          data-repo="GenomicsAotearoa/introduction-to-shell"
+          data-repo-id="R_kgDOMbvivA"
+          data-category="Q&A"
+          data-category-id="DIC_kwDOMbvivM4ChQ-7"
+          data-mapping="og:title"
+          data-strict="0"
+          data-reactions-enabled="1"
+          data-emit-metadata="0"
+          data-input-position="top"
+          data-theme="dark"
+          data-lang="en"
+          crossorigin="anonymous"
+          async>
+  </script>
+
+  <!-- Synchronize Giscus theme with palette -->
+  <script>
+    var giscus = document.querySelector("script[src*=giscus]")
+
+    // Set palette on initial load
+    var palette = __md_get("__palette")
+    if (palette && typeof palette.color === "object") {
+      var theme = palette.color.scheme === "slate"
+        ? "transparent_dark"
+        : "light"
+
+      // Instruct Giscus to set theme
+      giscus.setAttribute("data-theme", theme) 
+    }
+
+    // Register event handlers after documented loaded
+    document.addEventListener("DOMContentLoaded", function() {
+      var ref = document.querySelector("[data-md-component=palette]")
+      ref.addEventListener("change", function() {
+        var palette = __md_get("__palette")
+        if (palette && typeof palette.color === "object") {
+          var theme = palette.color.scheme === "slate"
+            ? "transparent_dark"
+            : "light"
+
+          // Instruct Giscus to change theme
+          var frame = document.querySelector(".giscus-frame")
+          frame.contentWindow.postMessage(
+            { giscus: { setConfig: { theme } } },
+            "https://giscus.app"
+          )
+        }
+      })
+    })
+  </script>
+{% endif %}
\ No newline at end of file