diff --git a/.github/workflows/flutter-build.yml b/.github/workflows/flutter-build.yml
index 74bacc373..5ea98bcd6 100644
--- a/.github/workflows/flutter-build.yml
+++ b/.github/workflows/flutter-build.yml
@@ -33,6 +33,7 @@ env:
   RENDEZVOUS_SERVER: '${{ secrets.RENDEZVOUS_SERVER }}'
   API_SERVER: '${{ secrets.API_SERVER }}'
   UPLOAD_ARTIFACT: "${{ inputs.upload-artifact }}"
+  SIGN_BASE_URL: "${{ secrets.SIGN_BASE_URL }}"
 
 jobs:
   build-RustDeskTempTopMostWindow:
@@ -145,7 +146,7 @@ jobs:
           path: './flutter/build/windows/x64/runner/Release/'
 
       - name: Sign rustdesk files
-        if: env.UPLOAD_ARTIFACT == 'true'
+        if: env.UPLOAD_ARTIFACT == 'true' && env.SIGN_BASE_URL != ''
         shell: bash
         run: |
           pip3 install requests argparse
@@ -165,7 +166,7 @@ jobs:
           tar czf rustdesk-${{ env.VERSION }}-${{ matrix.job.arch }}.tar.gz rustdesk
 
       - name: Sign rustdesk self-extracted file
-        if: env.UPLOAD_ARTIFACT == 'true'
+        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
@@ -262,7 +263,7 @@ jobs:
           fi
 
       - name: Sign rustdesk files
-        if: env.UPLOAD_ARTIFACT == 'true'
+        if: env.UPLOAD_ARTIFACT == 'true' && env.SIGN_BASE_URL != ''
         shell: bash
         run: |
           pip3 install requests argparse
@@ -281,7 +282,7 @@ jobs:
           tar czf rustdesk-${{ env.VERSION }}-${{ matrix.job.arch }}.tar.gz rustdesk
 
       - name: Sign rustdesk self-extracted file
-        if: env.UPLOAD_ARTIFACT == 'true'
+        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/