diff --git a/.github/workflows/flutter-build.yml b/.github/workflows/flutter-build.yml
index 1ef91738a..fa2a622a0 100644
--- a/.github/workflows/flutter-build.yml
+++ b/.github/workflows/flutter-build.yml
@@ -238,7 +238,7 @@ jobs:
         shell: bash
         run: |
           pip3 install requests argparse
-          BASE_URL=${{ secrets.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./rustdesk/
+          BASE_URL=${{ env.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./rustdesk/
 
       - name: Build self-extracted executable
         shell: bash
@@ -269,7 +269,7 @@ jobs:
         if: env.UPLOAD_ARTIFACT == 'true' && env.SIGN_BASE_URL != ''
         shell: bash
         run: |
-          BASE_URL=${{ secrets.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./SignOutput
+          BASE_URL=${{ env.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./SignOutput
 
       - name: Publish Release
         uses: softprops/action-gh-release@v1
@@ -404,7 +404,7 @@ jobs:
         shell: bash
         run: |
           pip3 install requests argparse
-          BASE_URL=${{ secrets.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./Release/
+          BASE_URL=${{ env.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./Release/
 
       - name: Build self-extracted executable
         shell: bash
@@ -421,7 +421,7 @@ jobs:
         if: env.UPLOAD_ARTIFACT == 'true' && env.SIGN_BASE_URL != ''
         shell: bash
         run: |
-          BASE_URL=${{ secrets.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./SignOutput/
+          BASE_URL=${{ env.SIGN_BASE_URL }} SECRET_KEY=${{ secrets.SIGN_SECRET_KEY }} python3 res/job.py sign_files ./SignOutput/
 
       - name: Publish Release
         uses: softprops/action-gh-release@v1