diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 49cfe921..04cd6146 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,18 +9,21 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-20.04
+    # https://github.com/actions/runner-images
+    runs-on: ubuntu-latest
 
     steps:
 
       - name: Install Calibre
-        run: sudo apt install calibre  # for `ebook-convert` command
+        run: |
+          sudo apt update
+          sudo apt install calibre  # for `ebook-convert` command
 
       # https://github.com/actions/setup-node
       - name: Install Node.js
-        uses: actions/setup-node@v2-beta
+        uses: actions/setup-node@v4
         with:
-          node-version: '14'
+          node-version: '20'
 
       # https://github.com/actions/checkout
       - name: Checkout
diff --git a/revision_history.md b/revision_history.md
index f65270f8..5c5ce086 100644
--- a/revision_history.md
+++ b/revision_history.md
@@ -42,7 +42,7 @@ The book needs the help of its readers such as yourselves to point out any parts
     - 04 Sep 2008 and still in progress
     - Revival after a gap of 3.5 years!
     - Rewriting for Python 3.0
-    - Rewrite using http://www.mediawiki.org[MediaWiki] (again)
+    - Rewrite using [MediaWiki](http://www.mediawiki.org) (again)
 
 - 1.20
     - 13 Jan 2005