diff --git a/.github/workflows/epub.yml b/.github/workflows/epub.yml
index b3edf9ac..8b9b7036 100644
--- a/.github/workflows/epub.yml
+++ b/.github/workflows/epub.yml
@@ -1,56 +1,62 @@
 name: epub
 
 on:
-    push:
-        branches:
-            - main
-            - epub
-    workflow_dispatch:
+  push:
+    branches:
+      - epub
+  workflow_dispatch:
 
 permissions:
-    contents: read
+  contents: read
 
 jobs:
-    build:
-        name: Build EPUB and PDF
-        runs-on: ubuntu-latest
-        steps:
-            - uses: actions/checkout@v4
-
-            - name: Install Tectonic
-              uses: wtfjoke/setup-tectonic@v1
-              with:
-                  github-token: ${{ secrets.GITHUB_TOKEN }}
-
-            - name: Install Pandoc and Fonts
-              run: |
-                  sudo apt-get update
-                  sudo apt-get install -y pandoc fonts-noto-cjk
-
-            - name: Install mdbook
-              uses: peaceiris/actions-mdbook@v1
-              with:
-                  mdbook-version: "latest"
-
-            - name: Install mdbook-pandoc
-              run: |
-                  cargo install mdbook-pandoc
-
-            - name: Build Book
-              run: mdbook build
-
-            - name: List Output Directory
-              if: always()
-              run: find book -maxdepth 4
-
-            - name: Upload EPUB
-              uses: actions/upload-artifact@v4
-              with:
-                  name: rust-course-epub
-                  path: book/pandoc/epub/rust-course.epub
-
-            - name: Upload PDF
-              uses: actions/upload-artifact@v4
-              with:
-                  name: rust-course-pdf
-                  path: book/pandoc/pdf/rust-course.pdf
+  build:
+    name: Build EPUB and PDF
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install mdbook
+        uses: peaceiris/actions-mdbook@v2
+        with:
+          mdbook-version: "latest"
+
+      - name: Install Pandoc
+        uses: pandoc/actions/setup@v3
+        with:
+          version: "3.1"
+
+      - name: Install Tectonic
+        uses: wtfjoke/setup-tectonic@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install fonts
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y fonts-noto-cjk fonts-noto-cjk-extra
+
+      - name: Install mdbook-pandoc
+        run: |
+          cargo install mdbook-pandoc
+
+      - name: Build Book
+        run: mdbook build
+
+      - name: List Output Directory
+        if: always()
+        run: find book -maxdepth 4
+
+      - name: Upload EPUB
+        if: success()
+        uses: actions/upload-artifact@v4
+        with:
+          name: rust-course-epub
+          path: book/pandoc/epub/rust-course.epub
+
+      - name: Upload PDF
+        if: success()
+        uses: actions/upload-artifact@v4
+        with:
+          name: rust-course-pdf
+          path: book/pandoc/pdf/rust-course.pdf
diff --git a/book.toml b/book.toml
index 6a7d433e..cc8720f7 100644
--- a/book.toml
+++ b/book.toml
@@ -29,7 +29,7 @@ disabled = false
 output-file = "rust-course.pdf"
 pdf-engine = "tectonic"
 to = "pdf"
-variables = { mainfont = "Noto Sans CJK SC", sansfont = "Noto Sans CJK SC" }
+variables = { mainfont = "Noto Sans CJK SC", sansfont = "Noto Sans CJK SC", CJKmainfont = "Noto Sans CJK SC" }
 
 [output.pandoc.profile.epub]
 output-file = "rust-course.epub"