diff --git a/.github/scripts/fix-mtime b/.github/scripts/fix-mtime
new file mode 100755
index 0000000..5c8983e
--- /dev/null
+++ b/.github/scripts/fix-mtime
@@ -0,0 +1,7 @@
+#!/usr/bin/env sh
+
+git ls-tree -r --name-only HEAD | while read filename; do
+  unixtime=$(git log -1 --format="%at" -- "${filename}")
+  touchtime=$(date -d @$unixtime +'%Y%m%d%H%M.%S')
+  touch -t ${touchtime} "${filename}"
+done
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index ea401e8..b0f5740 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -21,6 +21,9 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Fix last modified time of files
+        run: bash .github/scripts/fix-mtime
+
       - name: Render and publish
         uses: quarto-dev/quarto-actions/publish@v2
         with: