diff --git a/.github/workflows/docs-pr.yaml b/.github/workflows/docs-pr.yaml
index ebe352f22..da40fa240 100644
--- a/.github/workflows/docs-pr.yaml
+++ b/.github/workflows/docs-pr.yaml
@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Setup mdbook
-        uses: peaceiris/actions-mdbook@4b5ef36b314c2599664ca107bb8c02412548d79d # v1.1.14
+        uses: peaceiris/actions-mdbook@adeb05db28a0c0004681db83893d56c0388ea9ea # v1.2.0
         with:
           mdbook-version: '0.4.17'
 
diff --git a/changelog.d/14379.misc b/changelog.d/14379.misc
new file mode 100644
index 000000000..bcda89ff9
--- /dev/null
+++ b/changelog.d/14379.misc
@@ -0,0 +1 @@
+Bump peaceiris/actions-mdbook from 1.1.14 to 1.2.0.