diff --git a/.macos b/.macos
index d3d8942..d1b122d 100644
--- a/.macos
+++ b/.macos
@@ -22,6 +22,7 @@ defaults write com.apple.finder FXEnableExtensionChangeWarning -bool false
 defaults write com.apple.desktopservices DSDontWriteNetworkStores -bool true
 defaults write com.apple.desktopservices DSDontWriteUSBStores -bool true
 defaults write com.apple.dock tilesize -int 36
+defaults write com.apple.Dock size-immutable -bool true
 defaults write com.apple.dock launchanim -bool false
 defaults write com.apple.dock expose-animation-duration -float 0.1
 defaults write com.apple.dashboard mcx-disabled -bool true