diff --git a/system/Caskfile b/system/Caskfile
index 3aafa09..74f9326 100644
--- a/system/Caskfile
+++ b/system/Caskfile
@@ -15,3 +15,4 @@ cask install webp-quicklook
 cask install github
 cask install google-chrome
 cask install iterm2
+cask install slack