diff --git a/re-natal.coffee b/re-natal.coffee
index eb3271e..16e8b3d 100644
--- a/re-natal.coffee
+++ b/re-natal.coffee
@@ -253,7 +253,7 @@ copyFigwheelBridge = (projNameUs) ->
   edit "figwheel-bridge.js", [[projNameUsRx, projNameUs]]
 
 updateGitIgnore = () ->
-  fs.appendFileSync(".gitignore", "\n# Generated by re-natal\n#\nindex.android.js\nindex.ios.js")
+  fs.appendFileSync(".gitignore", "\n# Generated by re-natal\n#\nindex.android.js\nindex.ios.js\ntarget/\n")
   fs.appendFileSync(".gitignore", "\n# Figwheel\n#\nfigwheel_server.log")
 
 patchReactNativePackager = () ->
@@ -524,6 +524,9 @@ doUpgrade = (config) ->
   log 'upgraded .re-natal'
 
   edit '.gitignore', [[/^\s*env\/dev\s*$/m, ""]]
+  gignore = readFile '.gitignore'
+  if (!gignore.match /^\s*target\/\s*$/m)
+    fs.appendFileSync(".gitignore", "\ntarget/\n")
   log 'upgraded .gitignore'
 
 useComponent = (name) ->