diff --git a/.appveyor.yml b/.appveyor.yml
index 469bfecd0..6c36f1129 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -126,7 +126,7 @@ build_script:
 - ps: >-
     C:\Python27\python.exe setup.py build bdist_msi
 
-    signtool.exe sign /f "C:\projects\lbry\packaging\windows\certs\lbry2.pfx" /p %key_pass% /tr http://tsa.starfieldtech.com /td SHA256 /fd SHA256 "C:\projects\lbry\dist\*.msi"
+    signtool.exe sign /f "C:\projects\lbry\packaging\windows\certs\lbry2.pfx" /p "%key_pass%" /tr http://tsa.starfieldtech.com /td SHA256 /fd SHA256 "C:\projects\lbry\dist\*.msi"
 
 
 test_script:
@@ -143,4 +143,4 @@ artifacts:
 - path: build/exe.win32-2.7/
   name: lbry-portable
 - path: packaging/windows/lbry-win32-app/LBRY-URI.reg
-  name: LBRY-URI
+  name: LBRY-URI
\ No newline at end of file