diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e3b935f4..4f0ecee1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -777,7 +777,7 @@ jobs:
         run: |
           choco install innosetup
           export signtool="C:\Program Files (x86)\Windows Kits\10\bin\10.0.26100.0\x64\signtool.exe"
-          iscc /S"gamsigntool=$signtool verify /pa /v \$f" gam.iss
+          iscc /S"gamsigntool=$signtool sign /sha1 $WINDOWS_CODESIGN_CERT_HASH /tr http://time.certum.pl /td SHA256 /fd SHA256 /v \$f" gam.iss
         
       #- name: Windows package MSI
       #  if: runner.os == 'Windows' && matrix.goal != 'test'