diff --git a/.github/workflows/reusable-release-skill.yaml b/.github/workflows/reusable-release-skill.yaml
index 0e55b3f..40850d4 100644
--- a/.github/workflows/reusable-release-skill.yaml
+++ b/.github/workflows/reusable-release-skill.yaml
@@ -34,8 +34,9 @@ jobs:
     steps:
       - uses: http://120.25.191.12:3000/admin/actions-checkout@v4
 
+      # Pin PyArmor 8.5.3 — matches desktop python_env; PyArmor 9.x trial often fails on multi-file gen.
       - name: Setup Tools
-        run: pip install "pyarmor>=8.5" requests python-frontmatter --break-system-packages -i https://pypi.tuna.tsinghua.edu.cn/simple
+        run: pip install "pyarmor==8.5.3" requests python-frontmatter --break-system-packages -i https://pypi.tuna.tsinghua.edu.cn/simple
 
       - name: Encrypt Source Code
         run: |