diff --git a/win_build/boinc_signing.targets b/win_build/boinc_signing.targets
index 64aed14932..0b58ceb397 100644
--- a/win_build/boinc_signing.targets
+++ b/win_build/boinc_signing.targets
@@ -6,6 +6,15 @@
         <Exec Command='signtool sign /f "$(BUILDCODESIGN)/boinc.pfx" /p "$(CODESIGNBOINC)" /fd sha256 /d "BOINC Client Software" /du "http://boinc.berkeley.edu" /t "http://timestamp.verisign.com/scripts/timstamp.dll" "@(FilesToSign)"' WorkingDirectory="$(MSBuildProjectDirectory)" ContinueOnError="WarnAndContinue">
             <Output TaskParameter="ExitCode" PropertyName="ErrorCode"/>
         </Exec>
-        <Exec Command='signtool sign /f "$(BUILDCODESIGN)/boinc.pfx" /p "$(CODESIGNBOINC)" /fd sha256 /d "BOINC Client Software" /du "http://boinc.berkeley.edu" /t "http://timestamp.globalsign.com/scripts/timstamp.dll" "@(FilesToSign)"' WorkingDirectory="$(MSBuildProjectDirectory)" Condition="'$(ErrorCode)'=='1'"/>
+        <Exec Command='signtool sign /f "$(BUILDCODESIGN)/boinc.pfx" /p "$(CODESIGNBOINC)" /fd sha256 /d "BOINC Client Software" /du "http://boinc.berkeley.edu" /t "http://timestamp.globalsign.com/scripts/timstamp.dll" "@(FilesToSign)"' WorkingDirectory="$(MSBuildProjectDirectory)" Condition="'$(ErrorCode)'=='1'" ContinueOnError="WarnAndContinue">
+            <Output TaskParameter="ExitCode" PropertyName="ErrorCode"/>
+        </Exec>
+        <Exec Command='signtool sign /f "$(BUILDCODESIGN)/boinc.pfx" /p "$(CODESIGNBOINC)" /fd sha256 /d "BOINC Client Software" /du "http://boinc.berkeley.edu" /t "http://timestamp.comodoca.com/authenticode" "@(FilesToSign)"' WorkingDirectory="$(MSBuildProjectDirectory)" Condition="'$(ErrorCode)'=='1'" ContinueOnError="WarnAndContinue">
+            <Output TaskParameter="ExitCode" PropertyName="ErrorCode"/>
+        </Exec>
+        <Exec Command='signtool sign /f "$(BUILDCODESIGN)/boinc.pfx" /p "$(CODESIGNBOINC)" /fd sha256 /d "BOINC Client Software" /du "http://boinc.berkeley.edu" /t "http://www.startssl.com/timestamp" "@(FilesToSign)"' WorkingDirectory="$(MSBuildProjectDirectory)" Condition="'$(ErrorCode)'=='1'" ContinueOnError="WarnAndContinue">
+            <Output TaskParameter="ExitCode" PropertyName="ErrorCode"/>
+        </Exec>
+        <Exec Command='signtool sign /f "$(BUILDCODESIGN)/boinc.pfx" /p "$(CODESIGNBOINC)" /fd sha256 /d "BOINC Client Software" /du "http://boinc.berkeley.edu" /t "http://timestamp.sectigo.com" "@(FilesToSign)"' WorkingDirectory="$(MSBuildProjectDirectory)" Condition="'$(ErrorCode)'=='1'"/>
     </Target>
 </Project>