diff --git a/.sandstorm/sandstorm-pkgdef.capnp b/.sandstorm/sandstorm-pkgdef.capnp
index ef3136b666..b0af954c87 100644
--- a/.sandstorm/sandstorm-pkgdef.capnp
+++ b/.sandstorm/sandstorm-pkgdef.capnp
@@ -98,7 +98,7 @@ const pkgdef :Spk.PackageDefinition = (
   # `spk dev` will write a list of all the files your app uses to this file.
   # You should review it later, before shipping your app.
 
-  alwaysInclude = ["opt/app/app","opt/app/bootstrap","opt/app/config","opt/app/database","opt/app/public","opt/app/resources","opt/app/routes"],
+  alwaysInclude = ["opt/app/app","opt/app/bootstrap","opt/app/config","opt/app/database","opt/app/public","opt/app/resources","opt/app/routes","opt/app/vendor"],
   # Fill this list with more names of files or directories that should be
   # included in your package, even if not listed in sandstorm-files.list.
   # Use this to force-include stuff that you know you need but which may