diff --git a/.github/workflows/latex.yml b/.github/workflows/latex.yml
index 00499e9..27e1f0a 100644
--- a/.github/workflows/latex.yml
+++ b/.github/workflows/latex.yml
@@ -12,6 +12,12 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    env:
+      OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+      R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+      R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
+      R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
+      R2_BUCKET_NAME: ${{ secrets.R2_BUCKET_NAME }}
     steps:
       - uses: actions/checkout@v4
 
@@ -19,10 +25,10 @@ jobs:
         run: bash paper/concat_code.sh
 
       - name: Generate mirrors with Codex
-        if: ${{ secrets.OPENAI_API_KEY != '' }}
+        if: ${{ env.OPENAI_API_KEY != '' }}
         uses: openai/codex-action@v1
         with:
-          openai-api-key: ${{ secrets.OPENAI_API_KEY }}
+          openai-api-key: ${{ env.OPENAI_API_KEY }}
           sandbox: workspace-write
           safety-strategy: drop-sudo
           working-directory: .
@@ -75,13 +81,13 @@ jobs:
         run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
 
       - name: Upload to Cloudflare R2
-        if: ${{ github.event_name == 'push' && secrets.R2_ACCESS_KEY_ID != '' && secrets.R2_SECRET_ACCESS_KEY != '' && secrets.R2_ENDPOINT != '' && secrets.R2_BUCKET_NAME != '' }}
+        if: ${{ github.event_name == 'push' && env.R2_ACCESS_KEY_ID != '' && env.R2_SECRET_ACCESS_KEY != '' && env.R2_ENDPOINT != '' && env.R2_BUCKET_NAME != '' }}
         env:
-          AWS_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
-          AWS_ENDPOINT_URL: ${{ secrets.R2_ENDPOINT }}
+          AWS_ACCESS_KEY_ID: ${{ env.R2_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ env.R2_SECRET_ACCESS_KEY }}
+          AWS_ENDPOINT_URL: ${{ env.R2_ENDPOINT }}
           DATE: ${{ steps.date.outputs.date }}
-          BUCKET_NAME: ${{ secrets.R2_BUCKET_NAME }}
+          BUCKET_NAME: ${{ env.R2_BUCKET_NAME }}
         run: |
           pip install boto3
           python3 << 'EOF'