diff --git a/windows_cygwin/build.ps1 b/windows_cygwin/build.ps1
index 2ee0a98a..715ba0d6 100755
--- a/windows_cygwin/build.ps1
+++ b/windows_cygwin/build.ps1
@@ -2,8 +2,8 @@
 iwr https://chocolatey.org/install.ps1 -UseBasicParsing | iex
 
 # install base tools
-choco install firefox
-choco install googlechrome
+choco install -y firefox
+choco install -y googlechrome
 
 # install cygwin and all things inside
-choco install cygwin cyg-get
+choco install -y cygwin cyg-get