diff --git a/appveyor.yml b/appveyor.yml
index 6d73baf..08f07b9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,7 +3,7 @@ before_build:
   - nuget restore
 
 after_build:
-  - "C:\Program Files (x86)\Inno Setup 6\ISCC.exe" inno_setup.iss
+  - "C:\\Program Files (x86)\\Inno Setup 6\\ISCC.exe" inno_setup.iss
 
 platform:
   - Any CPU