diff --git a/Vagrantfile b/Vagrantfile
index d7904d78..585a42ed 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -82,6 +82,9 @@ Vagrant.configure(2) do |config|
       #install adobe font devkit to build source san hans
       pip install afdko
 
+      #work around an afdko dependency bug
+      pip install singledispatch==3.4.0.4
+
       #allow vagrant user to run docker
       adduser vagrant docker