diff --git a/.gitea/workflows/deploy-pages.yaml b/.gitea/workflows/deploy-pages.yaml
index 2b82f8c..4000c8a 100644
--- a/.gitea/workflows/deploy-pages.yaml
+++ b/.gitea/workflows/deploy-pages.yaml
@@ -19,14 +19,16 @@ jobs:
         with:
           node-version: "20"
 
-      - name: Install cobalt (prebuilt release)
+      - name: Install cobalt (prebuilt via eget)
         shell: bash
         run: |
           set -euo pipefail
-          curl -LSfs https://raw.githubusercontent.com/crate-ci/gh-install/master/v1/install.sh \
-            | sh -s -- --git cobalt-org/cobalt.rs --crate cobalt
-          ~/.cargo/bin/cobalt --version  # 動作確認
-        # 公式ドキュメントの「Pre-built Binary」を使用（rustc不要）。:contentReference[oaicite:1]{index=1}
+          apt-get update
+          apt-get install -y ca-certificates curl tar
+          curl -fsSL https://zyedidia.github.io/eget.sh | sh
+          ./eget cobalt-org/cobalt.rs --to /usr/local/bin/cobalt
+          cobalt --version
+        # eget はGitHub Releasesから適切な資産を自動選択します。:contentReference[oaicite:1]{index=1}
 
       - name: Build site with cobalt
         run: cobalt build