diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 6589d4c..c7d645e 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -24,6 +24,15 @@ jobs:
       - name: Build
         run: npm run build
 
+      - name: Debug SSH key
+        run: |
+          echo "=== key line count ==="
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" | wc -l
+          echo "=== first line ==="
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" | head -1
+          echo "=== last line ==="
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" | tail -1
+
       - name: Deploy via SCP
         run: |
           mkdir -p ~/.ssh